<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:29e117aa-9d8f-4a31-8861-3506997d8df0,g:09110ae1-cce3-4d59-9797-e4e2bf044173-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://opendoor.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="open-20231231.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_46f4750b-b4ab-4272-8815-e7c7eaf88099" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_AssetsCurrent_46f4750b-b4ab-4272-8815-e7c7eaf88099" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_16b486cb-83a8-4acd-b5f4-6830078c597b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_Goodwill_16b486cb-83a8-4acd-b5f4-6830078c597b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_698c1ea2-df8a-4d0d-96ad-eed1df7f013f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_698c1ea2-df8a-4d0d-96ad-eed1df7f013f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_d57f63f1-030e-4686-915c-afa9710a22ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_d57f63f1-030e-4686-915c-afa9710a22ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_0c82536f-f938-4426-9ab1-37f640fd9a83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_0c82536f-f938-4426-9ab1-37f640fd9a83" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_5a41ee43-65cb-4855-a077-684cbcf9a010" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b8b0ace2-e989-4b15-bbf0-cbc0953e9c77" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_5a41ee43-65cb-4855-a077-684cbcf9a010" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_3de22a81-c9e4-49fb-8ce3-eb17ef3113cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_6988c8a5-64e7-4137-9055-5e01532fc162" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_3de22a81-c9e4-49fb-8ce3-eb17ef3113cb" xlink:to="loc_us-gaap_InterestPayableCurrent_6988c8a5-64e7-4137-9055-5e01532fc162" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditCurrent_15657468-a40b-4889-a2a6-711f7a37b0a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LinesOfCreditCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_3de22a81-c9e4-49fb-8ce3-eb17ef3113cb" xlink:to="loc_us-gaap_LinesOfCreditCurrent_15657468-a40b-4889-a2a6-711f7a37b0a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_974bca8c-c016-4b22-8023-ef494e9ed9ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_3de22a81-c9e4-49fb-8ce3-eb17ef3113cb" xlink:to="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_974bca8c-c016-4b22-8023-ef494e9ed9ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_691d1184-711d-48ea-9d65-11c1dafdf1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_3de22a81-c9e4-49fb-8ce3-eb17ef3113cb" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_691d1184-711d-48ea-9d65-11c1dafdf1f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_ea59d26f-b304-4097-9baf-e3b4701942fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_4e28042a-e948-4ddf-b708-2dd9a0bba39d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ea59d26f-b304-4097-9baf-e3b4701942fd" xlink:to="loc_us-gaap_StockholdersEquity_4e28042a-e948-4ddf-b708-2dd9a0bba39d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_beb288c2-1806-43f1-982e-eb5ec262f4e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ea59d26f-b304-4097-9baf-e3b4701942fd" xlink:to="loc_us-gaap_CommitmentsAndContingencies_beb288c2-1806-43f1-982e-eb5ec262f4e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_d9e6d2f4-9bf2-4d60-a71c-8b0952befe82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_ea59d26f-b304-4097-9baf-e3b4701942fd" xlink:to="loc_us-gaap_Liabilities_d9e6d2f4-9bf2-4d60-a71c-8b0952befe82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_6187d5c3-bc1a-4275-9a3f-b90c61cb1e72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_b3e7cc28-b9fa-4930-979b-ce48f1179d8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6187d5c3-bc1a-4275-9a3f-b90c61cb1e72" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_b3e7cc28-b9fa-4930-979b-ce48f1179d8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_911a1174-55d7-4b3b-82a4-15cd679551da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6187d5c3-bc1a-4275-9a3f-b90c61cb1e72" xlink:to="loc_us-gaap_CommonStockValue_911a1174-55d7-4b3b-82a4-15cd679551da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3239c0ba-0301-4983-a858-d67d7b675d53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6187d5c3-bc1a-4275-9a3f-b90c61cb1e72" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3239c0ba-0301-4983-a858-d67d7b675d53" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_3eb0b7b8-581a-480c-a915-d5eb92be7915" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6187d5c3-bc1a-4275-9a3f-b90c61cb1e72" xlink:to="loc_us-gaap_AdditionalPaidInCapital_3eb0b7b8-581a-480c-a915-d5eb92be7915" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_53c1f815-562c-443f-a646-46b9bbdd2324" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:to="loc_us-gaap_LiabilitiesCurrent_53c1f815-562c-443f-a646-46b9bbdd2324" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermLineOfCredit_48b7e530-9292-473d-9c9b-a53070c9dc6d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermLineOfCredit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:to="loc_us-gaap_LongTermLineOfCredit_48b7e530-9292-473d-9c9b-a53070c9dc6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d2d63c84-5b07-482c-a5aa-14628e6e123f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d2d63c84-5b07-482c-a5aa-14628e6e123f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_34f56f0a-76f2-492d-b275-f6b1f15883a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_34f56f0a-76f2-492d-b275-f6b1f15883a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_2c1f1eab-c302-4b03-bad8-6f01ace8b1e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9d825b50-7542-45bc-83d4-87eb037861ab" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_2c1f1eab-c302-4b03-bad8-6f01ace8b1e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstate_527728b5-5307-4678-8801-a9ba870a3df4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryRealEstate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_InventoryRealEstate_527728b5-5307-4678-8801-a9ba870a3df4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_2c682488-abda-4565-a5cd-d161232b5ca9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_2c682488-abda-4565-a5cd-d161232b5ca9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_9a601765-12ca-4b3f-9264-9e91b5e86923" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_OtherAssetsCurrent_9a601765-12ca-4b3f-9264-9e91b5e86923" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_f92a9475-9dbb-4f0c-8982-1ef99eb2ad35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_f92a9475-9dbb-4f0c-8982-1ef99eb2ad35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EscrowDeposit_6044b775-4b17-462c-92d4-94cd838ef530" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EscrowDeposit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_EscrowDeposit_6044b775-4b17-462c-92d4-94cd838ef530" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_1a8fe8bb-d0d8-4a61-a51e-d59625f3981f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d6ddcf47-cb6d-4880-bfc3-37853d0fa03a" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_1a8fe8bb-d0d8-4a61-a51e-d59625f3981f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="open-20231231.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_4ea7b23a-ab8c-4ab2-ac45-8bffaa3d5d84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:to="loc_us-gaap_SellingAndMarketingExpense_4ea7b23a-ab8c-4ab2-ac45-8bffaa3d5d84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_ca991c47-6d9c-4dd4-9daa-1dbd26905183" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_ca991c47-6d9c-4dd4-9daa-1dbd26905183" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_9366a6c2-ff87-4d97-94dd-283379d5d2a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_9366a6c2-ff87-4d97-94dd-283379d5d2a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_52fbd35f-ff11-42ef-b48d-0cbbd4e297a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_52fbd35f-ff11-42ef-b48d-0cbbd4e297a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_3511d709-9353-4009-b078-5cbf047a9d72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_5d0b0fc4-373d-4642-86bb-2dd1f555d956" xlink:to="loc_us-gaap_RestructuringCharges_3511d709-9353-4009-b078-5cbf047a9d72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_57573b52-3226-4b46-abb2-940aabec7ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_57573b52-3226-4b46-abb2-940aabec7ac8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_93b8477a-2cc2-4723-bf51-5b710384b642" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:to="loc_us-gaap_InterestExpense_93b8477a-2cc2-4723-bf51-5b710384b642" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_403b4482-cca0-4a3e-ab3a-a7a97f8e784d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_403b4482-cca0-4a3e-ab3a-a7a97f8e784d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_816ed5b0-a05d-40d2-979b-4fb35240f829" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:to="loc_us-gaap_OperatingIncomeLoss_816ed5b0-a05d-40d2-979b-4fb35240f829" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_a0410bdb-d453-4fd4-9562-da88adc30c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_15b4e395-f568-4131-afb9-e8fa5d8aaaec" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_a0410bdb-d453-4fd4-9562-da88adc30c9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_7a7fef31-1a64-4e15-8ac8-a94a045b6d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_adef5485-ee8e-48bc-8ba7-63182de8cad2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_7a7fef31-1a64-4e15-8ac8-a94a045b6d2c" xlink:to="loc_us-gaap_OperatingExpenses_adef5485-ee8e-48bc-8ba7-63182de8cad2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_db0f10df-db7e-40bd-b93c-d429a56c36e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_7a7fef31-1a64-4e15-8ac8-a94a045b6d2c" xlink:to="loc_us-gaap_GrossProfit_db0f10df-db7e-40bd-b93c-d429a56c36e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_a0998728-384b-4c96-b43e-936af8baa87e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d28999fb-bcda-4898-9de0-3cefa6818fe5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_a0998728-384b-4c96-b43e-936af8baa87e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d28999fb-bcda-4898-9de0-3cefa6818fe5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_c2f5783b-1c54-45d9-a5a5-3aed8238aa5f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_a0998728-384b-4c96-b43e-936af8baa87e" xlink:to="loc_us-gaap_CostOfRevenue_c2f5783b-1c54-45d9-a5a5-3aed8238aa5f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_70375c5b-02b9-4961-84db-75f0d0949abe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_44bfca3c-cb68-4b74-9f3b-4b9bf272391b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_70375c5b-02b9-4961-84db-75f0d0949abe" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_44bfca3c-cb68-4b74-9f3b-4b9bf272391b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3a484682-7baa-408c-bf6c-e1565fb156a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_70375c5b-02b9-4961-84db-75f0d0949abe" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3a484682-7baa-408c-bf6c-e1565fb156a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_2573e95b-ae4e-47ce-9d27-ce50f5ea9bb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromSubsidiariesNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_70375c5b-02b9-4961-84db-75f0d0949abe" xlink:to="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_2573e95b-ae4e-47ce-9d27-ce50f5ea9bb6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="open-20231231.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_2adb9278-baaa-4e74-a9dd-69c6be10bbaa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_1bd3bd50-f498-48eb-b5cd-309602087f89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_2adb9278-baaa-4e74-a9dd-69c6be10bbaa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_1bd3bd50-f498-48eb-b5cd-309602087f89" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_4f4a47a4-5ddf-4e8e-b647-195c4da928e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_2adb9278-baaa-4e74-a9dd-69c6be10bbaa" xlink:to="loc_us-gaap_NetIncomeLoss_4f4a47a4-5ddf-4e8e-b647-195c4da928e2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="open-20231231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_3e335778-7968-4410-898f-5ffa516cf1e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_3e335778-7968-4410-898f-5ffa516cf1e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale_a89940da-a2eb-43a7-ab28-7bb2e6c5e30f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale_a89940da-a2eb-43a7-ab28-7bb2e6c5e30f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_IncreaseDecreaseInEscrowReceivable_6703afef-618f-49de-b91b-5427d5a174b2" xlink:href="open-20231231.xsd#open_IncreaseDecreaseInEscrowReceivable"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_open_IncreaseDecreaseInEscrowReceivable_6703afef-618f-49de-b91b-5427d5a174b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_IncreaseDecreaseInLeaseLiabilities_e3fd70b1-3bbc-44ed-9795-26a36e8b358a" xlink:href="open-20231231.xsd#open_IncreaseDecreaseInLeaseLiabilities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_open_IncreaseDecreaseInLeaseLiabilities_e3fd70b1-3bbc-44ed-9795-26a36e8b358a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_4ed8417b-95d1-435e-b331-a58ea0cd35fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_NetIncomeLoss_4ed8417b-95d1-435e-b331-a58ea0cd35fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_a99268cd-c0fd-4b11-82f0-63453f2b8dce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_a99268cd-c0fd-4b11-82f0-63453f2b8dce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_3462b2b0-13d8-4716-a48c-ad7a27ceed35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_3462b2b0-13d8-4716-a48c-ad7a27ceed35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_572f8ec6-dfc1-496f-8da9-1b3cb607fc15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryWriteDown"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_InventoryWriteDown_572f8ec6-dfc1-496f-8da9-1b3cb607fc15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_983485eb-9e25-4d50-85d0-219464f22022" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_983485eb-9e25-4d50-85d0-219464f22022" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_f7a864ea-a584-4c9c-85b6-8fc19308e806" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_f7a864ea-a584-4c9c-85b6-8fc19308e806" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_85ae4d87-9c50-4cbd-9f9a-b8e04b8ce349" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_85ae4d87-9c50-4cbd-9f9a-b8e04b8ce349" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_91cd9e08-b4cb-4c6a-9d4e-43983269e687" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_ShareBasedCompensation_91cd9e08-b4cb-4c6a-9d4e-43983269e687" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_494f603d-9c0e-4565-b916-5ea16e729182" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_494f603d-9c0e-4565-b916-5ea16e729182" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_f2b68922-e7c5-45a4-9095-86f7e785a977" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_f2b68922-e7c5-45a4-9095-86f7e785a977" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_d1e13760-2924-4599-903a-0696b9c63801" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_d1e13760-2924-4599-903a-0696b9c63801" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_36f78663-cbcc-426c-beb9-643b278234f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_36f78663-cbcc-426c-beb9-643b278234f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_b1be8a7d-ad10-4412-ae70-619c741eb929" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_b1be8a7d-ad10-4412-ae70-619c741eb929" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_0cb82aad-d1ec-4d9a-8357-14cc50e6d141" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="18" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_8f620ffd-0eeb-4c7d-b7c6-345f7be56773" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_0cb82aad-d1ec-4d9a-8357-14cc50e6d141" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_0b01dc99-fd6f-4e17-9fb5-03f2759ad467" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_0b01dc99-fd6f-4e17-9fb5-03f2759ad467" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_16e84c07-971d-45aa-93bb-08cb834bd48f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_16e84c07-971d-45aa-93bb-08cb834bd48f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_4298855d-ed16-483c-b50e-b95433014809" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_4298855d-ed16-483c-b50e-b95433014809" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_f648410c-3da6-408d-aff3-51069472299d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_f648410c-3da6-408d-aff3-51069472299d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_357323a3-fb61-4584-9f98-d1b8211a3a91" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_357323a3-fb61-4584-9f98-d1b8211a3a91" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_0d57b4c6-946e-422c-b129-f1ac06c7889f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_0d57b4c6-946e-422c-b129-f1ac06c7889f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_fe3202fd-4adc-43ac-ad10-26e2ac564896" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireEquitySecuritiesFvNi"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_fe3202fd-4adc-43ac-ad10-26e2ac564896" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_743d871a-ee40-43a9-a41e-345bbcebeb51" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07fe7180-a0e0-4059-90f0-9c4246a74c6a" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_743d871a-ee40-43a9-a41e-345bbcebeb51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_PaymentsForOptionIndexedToIssuersEquity_c8d67919-0321-4dc8-9907-fd68aad803bd" xlink:href="open-20231231.xsd#open_PaymentsForOptionIndexedToIssuersEquity"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_open_PaymentsForOptionIndexedToIssuersEquity_c8d67919-0321-4dc8-9907-fd68aad803bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfConvertibleDebt_daee2c29-491d-45ae-9299-2188b7f65d64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_RepaymentsOfConvertibleDebt_daee2c29-491d-45ae-9299-2188b7f65d64" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_2f359623-af75-4c85-acfd-1d3656793c36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfSecuredDebt"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_RepaymentsOfSecuredDebt_2f359623-af75-4c85-acfd-1d3656793c36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_354f5170-7f50-41aa-9fbc-e9405d092177" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_354f5170-7f50-41aa-9fbc-e9405d092177" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_0d11c5f2-4915-42ab-ae0d-103368d30890" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_0d11c5f2-4915-42ab-ae0d-103368d30890" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_27597db4-5bec-48a5-a019-3f934cd6a5b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_27597db4-5bec-48a5-a019-3f934cd6a5b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_f9135410-5f7d-4b3a-bd99-02d90ae74380" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_f9135410-5f7d-4b3a-bd99-02d90ae74380" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockPlans_419dfb1d-e0e4-4b21-a90e-0c7dd809ec69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromStockPlans"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromStockPlans_419dfb1d-e0e4-4b21-a90e-0c7dd809ec69" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromWarrantExercises_b9049214-d5bb-47d4-a3b1-4f52c340a3cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromWarrantExercises"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromWarrantExercises_b9049214-d5bb-47d4-a3b1-4f52c340a3cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_7bf2160f-26e4-4988-9d98-70a3088dbb8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_7bf2160f-26e4-4988-9d98-70a3088dbb8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_207e7f2c-363b-4da7-95f8-79c5e307810e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_207e7f2c-363b-4da7-95f8-79c5e307810e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_d6ad8fae-4a28-447f-b8b9-4b7273f7ce21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_d6ad8fae-4a28-447f-b8b9-4b7273f7ce21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_9f2039de-2f7f-4423-80d3-611d4ca7bd03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_9f2039de-2f7f-4423-80d3-611d4ca7bd03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_065dae7f-618f-470c-9ea9-60516dfacb22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_da86d3a3-7284-409f-ad92-b88a8259d8b9" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_065dae7f-618f-470c-9ea9-60516dfacb22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8c011dd9-7c12-42fa-a8b4-64da6432d7d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_44b44289-d4fb-4018-9713-62ffc3cbb27d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8c011dd9-7c12-42fa-a8b4-64da6432d7d6" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_44b44289-d4fb-4018-9713-62ffc3cbb27d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_7c51b6d3-e111-487c-b426-5ab1546ccfb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCash"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8c011dd9-7c12-42fa-a8b4-64da6432d7d6" xlink:to="loc_us-gaap_RestrictedCash_7c51b6d3-e111-487c-b426-5ab1546ccfb6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_a0752ad7-f509-4dc8-9a8d-553c531b17f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d31071f5-48c2-4423-bb88-281addae1312" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_a0752ad7-f509-4dc8-9a8d-553c531b17f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d31071f5-48c2-4423-bb88-281addae1312" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3b59ba5d-20a5-49db-8f7e-21fb9aeda5a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_a0752ad7-f509-4dc8-9a8d-553c531b17f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3b59ba5d-20a5-49db-8f7e-21fb9aeda5a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a1518ad9-65a3-446f-8541-ac517d5c1acf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_a0752ad7-f509-4dc8-9a8d-553c531b17f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a1518ad9-65a3-446f-8541-ac517d5c1acf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/REALESTATEINVENTORYScheduleofRealEstateInventoryDetails" xlink:type="simple" xlink:href="open-20231231.xsd#REALESTATEINVENTORYScheduleofRealEstateInventoryDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/REALESTATEINVENTORYScheduleofRealEstateInventoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstate_ad7aaa62-e9e8-4531-92da-aa9318aa94b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryRealEstate"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstateConstructionInProcess_d739b741-1df8-43c1-b595-e30ae47b258c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryRealEstateConstructionInProcess"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryRealEstate_ad7aaa62-e9e8-4531-92da-aa9318aa94b0" xlink:to="loc_us-gaap_InventoryRealEstateConstructionInProcess_d739b741-1df8-43c1-b595-e30ae47b258c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_InventoryRealEstateInResaleContract_afb479e8-c00a-44b8-b55e-6dfb08abc544" xlink:href="open-20231231.xsd#open_InventoryRealEstateInResaleContract"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryRealEstate_ad7aaa62-e9e8-4531-92da-aa9318aa94b0" xlink:to="loc_open_InventoryRealEstateInResaleContract_afb479e8-c00a-44b8-b55e-6dfb08abc544" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstateHeldForSale_98a2c9ee-dcc3-4f80-9d1b-069e953ce590" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryRealEstateHeldForSale"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryRealEstate_ad7aaa62-e9e8-4531-92da-aa9318aa94b0" xlink:to="loc_us-gaap_InventoryRealEstateHeldForSale_98a2c9ee-dcc3-4f80-9d1b-069e953ce590" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSAmortizedCostDetails" xlink:type="simple" xlink:href="open-20231231.xsd#CASHCASHEQUIVALENTSANDINVESTMENTSAmortizedCostDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSAmortizedCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_59fe345a-3bf2-463d-b9bc-47656e0262fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_cff35392-1a7d-4223-b017-cf25b7df763a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_59fe345a-3bf2-463d-b9bc-47656e0262fa" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_cff35392-1a7d-4223-b017-cf25b7df763a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72ca3b44-d66d-4967-9754-d998b46ec3cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_59fe345a-3bf2-463d-b9bc-47656e0262fa" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72ca3b44-d66d-4967-9754-d998b46ec3cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_a68d1d08-5777-4892-9129-7f2934e5d583" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_59fe345a-3bf2-463d-b9bc-47656e0262fa" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_a68d1d08-5777-4892-9129-7f2934e5d583" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_CashCashEquivalentsAndMarketableSecurities_a5d1c93b-17c5-4993-a030-d17c51e1870a" xlink:href="open-20231231.xsd#open_CashCashEquivalentsAndMarketableSecurities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_70337a6c-f3aa-46e0-9391-88ef505ff49c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_open_CashCashEquivalentsAndMarketableSecurities_a5d1c93b-17c5-4993-a030-d17c51e1870a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_70337a6c-f3aa-46e0-9391-88ef505ff49c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0bbb6854-42e9-4a4c-a66e-9238a4cb179b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_open_CashCashEquivalentsAndMarketableSecurities_a5d1c93b-17c5-4993-a030-d17c51e1870a" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0bbb6854-42e9-4a4c-a66e-9238a4cb179b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_e43c64ef-4445-47e5-990c-a0910a6bbdd8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_open_CashCashEquivalentsAndMarketableSecurities_a5d1c93b-17c5-4993-a030-d17c51e1870a" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_e43c64ef-4445-47e5-990c-a0910a6bbdd8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_CashCashEquivalentsAndMarketableSecuritiesAmortizedCost_070756e0-9b75-4837-a510-a0abff775f57" xlink:href="open-20231231.xsd#open_CashCashEquivalentsAndMarketableSecuritiesAmortizedCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_bdf5724c-c31a-4b77-833b-b997cee94e94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_open_CashCashEquivalentsAndMarketableSecuritiesAmortizedCost_070756e0-9b75-4837-a510-a0abff775f57" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_bdf5724c-c31a-4b77-833b-b997cee94e94" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_69630d3f-860a-440a-8933-b590a7ceb503" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_open_CashCashEquivalentsAndMarketableSecuritiesAmortizedCost_070756e0-9b75-4837-a510-a0abff775f57" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_69630d3f-860a-440a-8933-b590a7ceb503" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSSummaryofDebtSecuritiesDetails" xlink:type="simple" xlink:href="open-20231231.xsd#CASHCASHEQUIVALENTSANDINVESTMENTSSummaryofDebtSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSSummaryofDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_81eb4f61-1eba-409c-b868-4e89d67f41f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_43a5472b-a383-4c63-961c-eb83f90bbb95" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_81eb4f61-1eba-409c-b868-4e89d67f41f1" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_43a5472b-a383-4c63-961c-eb83f90bbb95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_aeebc8b8-aa7b-48a6-8bf4-46cf2f5f6316" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_81eb4f61-1eba-409c-b868-4e89d67f41f1" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_aeebc8b8-aa7b-48a6-8bf4-46cf2f5f6316" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_dd573e6c-25ed-436f-8267-771f1afcba09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59a6697d-266f-4723-905f-48940b9669b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_dd573e6c-25ed-436f-8267-771f1afcba09" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59a6697d-266f-4723-905f-48940b9669b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_9d8eec61-1292-40e7-92af-250b6629cfdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_dd573e6c-25ed-436f-8267-771f1afcba09" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_9d8eec61-1292-40e7-92af-250b6629cfdb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSNonmarketableEquitySecuritiesDetails" xlink:type="simple" xlink:href="open-20231231.xsd#CASHCASHEQUIVALENTSANDINVESTMENTSNonmarketableEquitySecuritiesDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CASHCASHEQUIVALENTSANDINVESTMENTSNonmarketableEquitySecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue_b86cedb3-53a8-46a8-b2cb-7ce1be5d3fa5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_b2c23656-af56-4e4c-abd8-d6246171d87b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue_b86cedb3-53a8-46a8-b2cb-7ce1be5d3fa5" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_b2c23656-af56-4e4c-abd8-d6246171d87b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_5480f2f1-ea3b-4f61-b039-08b47117f106" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue_b86cedb3-53a8-46a8-b2cb-7ce1be5d3fa5" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_5480f2f1-ea3b-4f61-b039-08b47117f106" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/VARIABLEINTERESTENTITIESDetails" xlink:type="simple" xlink:href="open-20231231.xsd#VARIABLEINTERESTENTITIESDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/VARIABLEINTERESTENTITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_ba671b4e-a901-42d0-890d-8a2219926f40" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_fbe96af7-301a-4760-ada5-f08d57367a98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_ba671b4e-a901-42d0-890d-8a2219926f40" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_fbe96af7-301a-4760-ada5-f08d57367a98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_b9ac0608-6bc9-4e6c-9e6b-b97d1e789e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_ba671b4e-a901-42d0-890d-8a2219926f40" xlink:to="loc_us-gaap_OtherAssets_b9ac0608-6bc9-4e6c-9e6b-b97d1e789e1e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstate_2ad848ac-bea9-499a-a325-f77eef186cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryRealEstate"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_ba671b4e-a901-42d0-890d-8a2219926f40" xlink:to="loc_us-gaap_InventoryRealEstate_2ad848ac-bea9-499a-a325-f77eef186cc0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_197a28ff-59df-4662-a6f3-2ee76a3d9ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_4832a414-f251-4337-a51b-ca2c1098c89b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_197a28ff-59df-4662-a6f3-2ee76a3d9ff5" xlink:to="loc_us-gaap_OtherLiabilities_4832a414-f251-4337-a51b-ca2c1098c89b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_21f62c40-96f1-458e-83bc-3b1fa0e42770" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_197a28ff-59df-4662-a6f3-2ee76a3d9ff5" xlink:to="loc_us-gaap_LineOfCredit_21f62c40-96f1-458e-83bc-3b1fa0e42770" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/CREDITFACILITIESANDLONGTERMDEBTSummaryofCreditFacilitiesandLongTermDebtDetails" xlink:type="simple" xlink:href="open-20231231.xsd#CREDITFACILITIESANDLONGTERMDEBTSummaryofCreditFacilitiesandLongTermDebtDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/CREDITFACILITIESANDLONGTERMDEBTSummaryofCreditFacilitiesandLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_2efcebe4-6298-4ebf-93dc-602094682a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsCurrentNet_53a737f3-4239-43f7-8c3f-8c9c6383a180" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsCurrentNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtCurrent_2efcebe4-6298-4ebf-93dc-602094682a2e" xlink:to="loc_us-gaap_DeferredFinanceCostsCurrentNet_53a737f3-4239-43f7-8c3f-8c9c6383a180" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_LongTermDebtGrossCurrent_3aa83137-f9ff-4f97-bf5c-e2ba306c9e50" xlink:href="open-20231231.xsd#open_LongTermDebtGrossCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtCurrent_2efcebe4-6298-4ebf-93dc-602094682a2e" xlink:to="loc_open_LongTermDebtGrossCurrent_3aa83137-f9ff-4f97-bf5c-e2ba306c9e50" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_89696dd7-530d-4d0b-b072-1ba1988632a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_c13e2180-a17b-41a4-92c5-a94ca4742898" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_89696dd7-530d-4d0b-b072-1ba1988632a5" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_c13e2180-a17b-41a4-92c5-a94ca4742898" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_LongTermDebtGrossNoncurrent_07002dbb-220f-4e6f-8904-3ab04835ae71" xlink:href="open-20231231.xsd#open_LongTermDebtGrossNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_89696dd7-530d-4d0b-b072-1ba1988632a5" xlink:to="loc_open_LongTermDebtGrossNoncurrent_07002dbb-220f-4e6f-8904-3ab04835ae71" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/FAIRVALUEDISCLOSURESFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="simple" xlink:href="open-20231231.xsd#FAIRVALUEDISCLOSURESFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/FAIRVALUEDISCLOSURESFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_c6b7dc51-3633-4355-b155-8631c2007eae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_245dc586-8a76-46b5-9a77-052b9606fe05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_c6b7dc51-3633-4355-b155-8631c2007eae" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_245dc586-8a76-46b5-9a77-052b9606fe05" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_16899a34-3cf1-4a5d-8430-3c2ab392c748" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MortgagesHeldForSaleFairValueDisclosure"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_c6b7dc51-3633-4355-b155-8631c2007eae" xlink:to="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_16899a34-3cf1-4a5d-8430-3c2ab392c748" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="simple" xlink:href="open-20231231.xsd#PROPERTYANDEQUIPMENTDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_25b190e1-013b-4e1e-aebe-e5c58ba62325" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_58977ab3-8595-4bf5-8548-985eee66c57d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_25b190e1-013b-4e1e-aebe-e5c58ba62325" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_58977ab3-8595-4bf5-8548-985eee66c57d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7f73bcdf-3422-4a0f-a309-4adae973bdca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_25b190e1-013b-4e1e-aebe-e5c58ba62325" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7f73bcdf-3422-4a0f-a309-4adae973bdca" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/LEASESLeaseCostDetails" xlink:type="simple" xlink:href="open-20231231.xsd#LEASESLeaseCostDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/LEASESLeaseCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_84141f98-5af0-443c-a898-828b7219a2a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_ed1debb2-9fdc-469e-9ffe-dbf2777a93f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84141f98-5af0-443c-a898-828b7219a2a7" xlink:to="loc_us-gaap_OperatingLeaseCost_ed1debb2-9fdc-469e-9ffe-dbf2777a93f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_a09cc45d-89bb-41c2-bd18-71a963af0e0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84141f98-5af0-443c-a898-828b7219a2a7" xlink:to="loc_us-gaap_VariableLeaseCost_a09cc45d-89bb-41c2-bd18-71a963af0e0c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubleaseIncome_fad304ae-fe00-4b83-a3e1-ee1d336e871c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubleaseIncome"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84141f98-5af0-443c-a898-828b7219a2a7" xlink:to="loc_us-gaap_SubleaseIncome_fad304ae-fe00-4b83-a3e1-ee1d336e871c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_6be73205-ff0b-499c-aea4-df5fa38c1fdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_84141f98-5af0-443c-a898-828b7219a2a7" xlink:to="loc_us-gaap_ShortTermLeaseCost_6be73205-ff0b-499c-aea4-df5fa38c1fdb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/LEASESMaturityofOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="open-20231231.xsd#LEASESMaturityofOperatingLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/LEASESMaturityofOperatingLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3bc70379-0cdc-41d2-8717-6365dbcbbb6a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_ef655798-39f4-4436-a504-c4ba69a0b45d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3bc70379-0cdc-41d2-8717-6365dbcbbb6a" xlink:to="loc_us-gaap_OperatingLeaseLiability_ef655798-39f4-4436-a504-c4ba69a0b45d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_befae076-27bf-4dbe-ad66-6895b2b625e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3bc70379-0cdc-41d2-8717-6365dbcbbb6a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_befae076-27bf-4dbe-ad66-6895b2b625e6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/LEASESMaturityofOperatingLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="open-20231231.xsd#LEASESMaturityofOperatingLeaseLiabilitiesDetails_1"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/LEASESMaturityofOperatingLeaseLiabilitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_c84fd14e-9b61-408a-ae7d-92c6126df159" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_c84fd14e-9b61-408a-ae7d-92c6126df159" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_f60f9b56-2b33-461d-a46e-a5e9c6797d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_f60f9b56-2b33-461d-a46e-a5e9c6797d9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8a5bfa44-fd58-48db-b9cb-9d9911ba9cf3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8a5bfa44-fd58-48db-b9cb-9d9911ba9cf3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_d3faf4dc-a312-46f5-ad8b-e637114199ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_d3faf4dc-a312-46f5-ad8b-e637114199ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_670e8c3f-9d1d-4048-a487-cb409285cde8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_670e8c3f-9d1d-4048-a487-cb409285cde8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_a4f6eaf9-3543-4a8e-bbb6-95cf2679d7b5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_cc20861e-d332-4543-b13d-96e19dfa409a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_a4f6eaf9-3543-4a8e-bbb6-95cf2679d7b5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/GOODWILLANDINTANGIBLEASSETSIntangibleAssetsSubjecttoAmortizationDetails" xlink:type="simple" xlink:href="open-20231231.xsd#GOODWILLANDINTANGIBLEASSETSIntangibleAssetsSubjecttoAmortizationDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/GOODWILLANDINTANGIBLEASSETSIntangibleAssetsSubjecttoAmortizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_31e5784e-93bc-4c29-b530-b5b535f82b62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_68428b66-0c63-47db-8f89-441c441de8e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_31e5784e-93bc-4c29-b530-b5b535f82b62" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_68428b66-0c63-47db-8f89-441c441de8e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_469c06aa-5811-4688-8c54-1e5b48c392a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_31e5784e-93bc-4c29-b530-b5b535f82b62" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_469c06aa-5811-4688-8c54-1e5b48c392a0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/GOODWILLANDINTANGIBLEASSETSExpectedAmortizationofIntangibleAssetsDetails" xlink:type="simple" xlink:href="open-20231231.xsd#GOODWILLANDINTANGIBLEASSETSExpectedAmortizationofIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/GOODWILLANDINTANGIBLEASSETSExpectedAmortizationofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_a7ee92c2-d14a-45f2-9687-d4801fd6588a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_d8b3bfe6-fe99-489d-9914-5be66776d749" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_a7ee92c2-d14a-45f2-9687-d4801fd6588a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_d8b3bfe6-fe99-489d-9914-5be66776d749" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/ACCOUNTSPAYABLEANDOTHERACCRUEDLIABILITIESDetails" xlink:type="simple" xlink:href="open-20231231.xsd#ACCOUNTSPAYABLEANDOTHERACCRUEDLIABILITIESDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/ACCOUNTSPAYABLEANDOTHERACCRUEDLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_39e9c8a3-4ba2-4eaa-b6aa-5547e01c49cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_39e9c8a3-4ba2-4eaa-b6aa-5547e01c49cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_06da080b-df57-4b05-acb3-b06d664b3430" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_06da080b-df57-4b05-acb3-b06d664b3430" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_675cf8d3-b89e-4672-849d-9cea7291f858" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_675cf8d3-b89e-4672-849d-9cea7291f858" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrent_56bb0998-6555-4372-bd53-158182e72aa9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxesPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:to="loc_us-gaap_TaxesPayableCurrent_56bb0998-6555-4372-bd53-158182e72aa9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_52c02e1c-e832-4bbd-9787-c08bfcf56800" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableTradeCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_421f22a6-515f-4582-be61-411ada6c5d4a" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_52c02e1c-e832-4bbd-9787-c08bfcf56800" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/INCOMETAXESProvisionforIncomeTaxesDetails" xlink:type="simple" xlink:href="open-20231231.xsd#INCOMETAXESProvisionforIncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/INCOMETAXESProvisionforIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_1a66a354-46a9-4696-9647-3131656806ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_5552ec6d-6ff0-4358-b5d7-be3b295c07af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_1a66a354-46a9-4696-9647-3131656806ee" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_5552ec6d-6ff0-4358-b5d7-be3b295c07af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_58a08866-760e-4e71-ba9b-9fb1eb1291f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_1a66a354-46a9-4696-9647-3131656806ee" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_58a08866-760e-4e71-ba9b-9fb1eb1291f3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/INCOMETAXESEffectiveTaxRateDetails" xlink:type="simple" xlink:href="open-20231231.xsd#INCOMETAXESEffectiveTaxRateDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/INCOMETAXESEffectiveTaxRateDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_3163d92a-a5b2-41c1-9778-8b80e70590a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_3163d92a-a5b2-41c1-9778-8b80e70590a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_e3adb99b-6fbc-47b3-a090-702264070535" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_e3adb99b-6fbc-47b3-a090-702264070535" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_336f3314-3f18-4536-9a70-613abde2031b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_336f3314-3f18-4536-9a70-613abde2031b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_f3b1cbe9-9d46-4d17-80c7-1ed49e13e434" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_f3b1cbe9-9d46-4d17-80c7-1ed49e13e434" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseWarrantExpenses_ebb9e0cc-e3a4-45ae-8e97-106dd5f9c04e" xlink:href="open-20231231.xsd#open_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseWarrantExpenses"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_open_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseWarrantExpenses_ebb9e0cc-e3a4-45ae-8e97-106dd5f9c04e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_5880300f-ecb5-423d-8101-dcc143c3a177" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_5880300f-ecb5-423d-8101-dcc143c3a177" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_EffectiveIncomeTaxRateReconciliationLimitationOnExecutiveCompensationPercent_d49c70ed-7ffc-429d-9bfe-faadb67289d8" xlink:href="open-20231231.xsd#open_EffectiveIncomeTaxRateReconciliationLimitationOnExecutiveCompensationPercent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_open_EffectiveIncomeTaxRateReconciliationLimitationOnExecutiveCompensationPercent_d49c70ed-7ffc-429d-9bfe-faadb67289d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_aaa57718-1c0a-44b7-98bb-5967577eacfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c2fe5840-3f62-4fa8-a0ce-0b21e6582d7c" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_aaa57718-1c0a-44b7-98bb-5967577eacfa" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://opendoor.com/role/INCOMETAXESDeferredTaxesDetails" xlink:type="simple" xlink:href="open-20231231.xsd#INCOMETAXESDeferredTaxesDetails"/>
  <link:calculationLink xlink:role="http://opendoor.com/role/INCOMETAXESDeferredTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_272a2af2-1fef-404a-ae68-582e8c1145bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_272a2af2-1fef-404a-ae68-582e8c1145bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_18fab354-3161-4596-819c-e5d69f49a475" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_18fab354-3161-4596-819c-e5d69f49a475" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_cbe23561-7d0c-40f2-accc-25be16263bae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_cbe23561-7d0c-40f2-accc-25be16263bae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_DeferredTaxAssetsLeaseLiability_56d67db9-3159-4c0f-830b-78fbb8ddb4a5" xlink:href="open-20231231.xsd#open_DeferredTaxAssetsLeaseLiability"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_open_DeferredTaxAssetsLeaseLiability_56d67db9-3159-4c0f-830b-78fbb8ddb4a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInventory_1601107a-3ca4-45dd-9b8b-cdc48d2eeb02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsInventory"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_us-gaap_DeferredTaxAssetsInventory_1601107a-3ca4-45dd-9b8b-cdc48d2eeb02" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_DeferredTaxAssetsSection174Capitalization_0755fd73-ba1d-4616-824d-4ad352c40a5c" xlink:href="open-20231231.xsd#open_DeferredTaxAssetsSection174Capitalization"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_open_DeferredTaxAssetsSection174Capitalization_0755fd73-ba1d-4616-824d-4ad352c40a5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_open_DeferredTaxAssetsGoodwill_e72ad483-43eb-427b-a7e4-da74359472d1" xlink:href="open-20231231.xsd#open_DeferredTaxAssetsGoodwill"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_c2b91be4-e82b-47cb-8197-7bbd55079d8d" xlink:to="loc_open_DeferredTaxAssetsGoodwill_e72ad483-43eb-427b-a7e4-da74359472d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_fd43c134-cd96-4b35-9146-0827f35ac8c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_8248fbda-b977-49a8-ab99-ce99264317a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_fd43c134-cd96-4b35-9146-0827f35ac8c6" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_8248fbda-b977-49a8-ab99-ce99264317a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_6c95bbe9-f2a9-490d-9b27-3a6cd6911cdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_fd43c134-cd96-4b35-9146-0827f35ac8c6" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_6c95bbe9-f2a9-490d-9b27-3a6cd6911cdb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_d807a206-eafc-448f-8102-368f5cb67af2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_39186bb4-d06a-4638-ae57-420690fe3ae1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_d807a206-eafc-448f-8102-368f5cb67af2" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_39186bb4-d06a-4638-ae57-420690fe3ae1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_72e76645-4187-4383-9b54-96bf123f8e86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_d807a206-eafc-448f-8102-368f5cb67af2" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_72e76645-4187-4383-9b54-96bf123f8e86" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_734b0467-2be0-476d-8ac5-cbba33e20246" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_f61d90f9-39b6-4440-9443-3df01ceb8cec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_734b0467-2be0-476d-8ac5-cbba33e20246" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_f61d90f9-39b6-4440-9443-3df01ceb8cec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_cf920abd-d2fb-476f-85a7-98ed83dd6abc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_734b0467-2be0-476d-8ac5-cbba33e20246" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_cf920abd-d2fb-476f-85a7-98ed83dd6abc" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
