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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:eb9d4e19-85bb-493c-8f4f-5ab9d946828b,g:32ff35fc-44ec-4b43-8668-f695bf17bc59-->
<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://www.klx.com/role/CondensedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="klxe-20210430.xsd#CondensedConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_dd7a46de-8616-4fcf-aa97-33c8046945fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_20f63451-646c-4f72-9bcb-196bd5fae9b0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dd7a46de-8616-4fcf-aa97-33c8046945fc" xlink:to="loc_us-gaap_CommonStockValue_20f63451-646c-4f72-9bcb-196bd5fae9b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_8a368c9b-3d42-4f20-8a7d-3d29e08977a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dd7a46de-8616-4fcf-aa97-33c8046945fc" xlink:to="loc_us-gaap_AdditionalPaidInCapital_8a368c9b-3d42-4f20-8a7d-3d29e08977a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_119fa280-9d10-4554-9b57-58ac55ee8921" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dd7a46de-8616-4fcf-aa97-33c8046945fc" xlink:to="loc_us-gaap_TreasuryStockCommonValue_119fa280-9d10-4554-9b57-58ac55ee8921" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_140c2eb5-1916-42cd-9166-4c5bc4462aa0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dd7a46de-8616-4fcf-aa97-33c8046945fc" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_140c2eb5-1916-42cd-9166-4c5bc4462aa0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_baf05ab9-dab7-4d18-8690-e3dc16c3b659" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_LiabilitiesCurrent_baf05ab9-dab7-4d18-8690-e3dc16c3b659" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_eecb8d91-a476-469c-84a6-546909b0b6f0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_eecb8d91-a476-469c-84a6-546909b0b6f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_f49f27f0-9a0c-4db3-ba2f-a6ca35089d09" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_f49f27f0-9a0c-4db3-ba2f-a6ca35089d09" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a994ac58-b509-479e-a4db-2368d1cc09f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_StockholdersEquity_a994ac58-b509-479e-a4db-2368d1cc09f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalLeaseObligationsNoncurrent_6d190b91-ea17-48ec-80c0-ea342a438f15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_CapitalLeaseObligationsNoncurrent_6d190b91-ea17-48ec-80c0-ea342a438f15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_22348215-acd5-4a3b-8cfd-6886cf512fa6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9801ab23-c883-4ae9-911a-9314a4c92360" xlink:to="loc_us-gaap_CommitmentsAndContingencies_22348215-acd5-4a3b-8cfd-6886cf512fa6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_d817eadd-4c3e-4d9d-a035-79a6bcd4aceb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_b3b69398-c424-40d5-85f6-e1b5ce020463" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_d817eadd-4c3e-4d9d-a035-79a6bcd4aceb" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_b3b69398-c424-40d5-85f6-e1b5ce020463" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalLeaseObligationsCurrent_a07d599d-d851-4385-99dc-660650207198" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_d817eadd-4c3e-4d9d-a035-79a6bcd4aceb" xlink:to="loc_us-gaap_CapitalLeaseObligationsCurrent_a07d599d-d851-4385-99dc-660650207198" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_0f4cbe4a-edb1-4350-add5-44045b6a3ba7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_d817eadd-4c3e-4d9d-a035-79a6bcd4aceb" xlink:to="loc_us-gaap_InterestPayableCurrent_0f4cbe4a-edb1-4350-add5-44045b6a3ba7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_d0922185-d6a3-4ad9-a5dd-a842e3477801" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_d817eadd-4c3e-4d9d-a035-79a6bcd4aceb" xlink:to="loc_us-gaap_AccountsPayableCurrent_d0922185-d6a3-4ad9-a5dd-a842e3477801" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_6a53e209-118f-4146-802c-c7d6da5ee4be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_796c3d3e-5ec3-4af4-afae-be2e219ddc51" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_6a53e209-118f-4146-802c-c7d6da5ee4be" xlink:to="loc_us-gaap_AssetsCurrent_796c3d3e-5ec3-4af4-afae-be2e219ddc51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_3db570ca-1a31-48cd-bc70-10f429c9cf2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6a53e209-118f-4146-802c-c7d6da5ee4be" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_3db570ca-1a31-48cd-bc70-10f429c9cf2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_b615020f-d36b-40b7-acd0-a6d7f9395527" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6a53e209-118f-4146-802c-c7d6da5ee4be" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_b615020f-d36b-40b7-acd0-a6d7f9395527" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_152d5c0f-c186-4bb8-a92c-8d2772c59f8d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_6a53e209-118f-4146-802c-c7d6da5ee4be" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_152d5c0f-c186-4bb8-a92c-8d2772c59f8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_4dbeba34-99c3-4f00-86c4-743b29fddebf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_f5f40f75-fef9-4df5-9f1a-8472c0fb7441" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_AssetsCurrent_4dbeba34-99c3-4f00-86c4-743b29fddebf" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_f5f40f75-fef9-4df5-9f1a-8472c0fb7441" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_a758d6f4-3358-47a5-90f6-9f9c6459954d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_4dbeba34-99c3-4f00-86c4-743b29fddebf" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_a758d6f4-3358-47a5-90f6-9f9c6459954d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_71def24b-8212-40e5-b789-cfb68bfc8296" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_4dbeba34-99c3-4f00-86c4-743b29fddebf" xlink:to="loc_us-gaap_InventoryNet_71def24b-8212-40e5-b789-cfb68bfc8296" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_83ea1070-c58c-44ad-9f4e-96ad0659d305" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_4dbeba34-99c3-4f00-86c4-743b29fddebf" xlink:to="loc_us-gaap_OtherAssetsCurrent_83ea1070-c58c-44ad-9f4e-96ad0659d305" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="klxe-20210430.xsd#CondensedConsolidatedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_87786d70-4e43-4c0f-8a40-3de13370f7c8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_b28041c3-7702-44c8-87cd-7a9ff3bca387" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_87786d70-4e43-4c0f-8a40-3de13370f7c8" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_b28041c3-7702-44c8-87cd-7a9ff3bca387" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_24c5fdfd-32e6-4d23-8f87-e94cff60479d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_87786d70-4e43-4c0f-8a40-3de13370f7c8" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_24c5fdfd-32e6-4d23-8f87-e94cff60479d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_40927cfa-8099-473e-87c0-8d37063122c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_40927cfa-8099-473e-87c0-8d37063122c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_a3c46c96-8708-410b-a2d8-1f33fe25de3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_AssetImpairmentCharges_a3c46c96-8708-410b-a2d8-1f33fe25de3c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_2d991977-c434-4cc5-8857-414db23bf138" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_2d991977-c434-4cc5-8857-414db23bf138" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_1464217a-bb9a-4c19-be11-51176a0c9a65" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_1464217a-bb9a-4c19-be11-51176a0c9a65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_279a13f3-7b87-4d21-b17f-3729ee828619" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_279a13f3-7b87-4d21-b17f-3729ee828619" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_19997622-ee07-427b-af13-c644e32c40b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_eeb6a07b-ad23-469e-bcb2-de55f268bcc3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_19997622-ee07-427b-af13-c644e32c40b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_25d22a50-2756-445a-9458-bf96233abca2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_14fdc1de-2e5e-4206-8f23-ef47e7d5dc2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_25d22a50-2756-445a-9458-bf96233abca2" xlink:to="loc_us-gaap_OperatingIncomeLoss_14fdc1de-2e5e-4206-8f23-ef47e7d5dc2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_b6bfff69-e04b-4594-abcf-b1dfe441021d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_25d22a50-2756-445a-9458-bf96233abca2" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_b6bfff69-e04b-4594-abcf-b1dfe441021d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="klxe-20210430.xsd#CondensedConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ea881fd3-59be-45a1-87f0-335ef8205824" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfNotesPayable_b02afb65-00c3-44de-a8bc-251e82688a3a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfNotesPayable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ea881fd3-59be-45a1-87f0-335ef8205824" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfNotesPayable_b02afb65-00c3-44de-a8bc-251e82688a3a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_bbe2db1d-d749-4dd3-94df-8c258b3c11f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ea881fd3-59be-45a1-87f0-335ef8205824" xlink:to="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_bbe2db1d-d749-4dd3-94df-8c258b3c11f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_c783105c-d668-4faa-8c9b-ddae1c55c041" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ea881fd3-59be-45a1-87f0-335ef8205824" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_c783105c-d668-4faa-8c9b-ddae1c55c041" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_b75d066d-d830-44f4-a479-b9ab049d2535" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ac3acc9-c3e6-4c2d-84e5-50ff544c1625" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_b75d066d-d830-44f4-a479-b9ab049d2535" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ac3acc9-c3e6-4c2d-84e5-50ff544c1625" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0cb53ce7-c6f9-4a26-9bca-06c010cd8baa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_b75d066d-d830-44f4-a479-b9ab049d2535" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0cb53ce7-c6f9-4a26-9bca-06c010cd8baa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_bef35646-66d7-4eea-8b9e-4cabb7a966e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_b75d066d-d830-44f4-a479-b9ab049d2535" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_bef35646-66d7-4eea-8b9e-4cabb7a966e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ce546e3e-6acd-441e-b60c-de09e886e851" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_4d7cfe23-70a0-498d-8859-483973992a18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ce546e3e-6acd-441e-b60c-de09e886e851" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_4d7cfe23-70a0-498d-8859-483973992a18" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_5a04c733-589a-43ce-afdb-a96c707f9d73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ce546e3e-6acd-441e-b60c-de09e886e851" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_5a04c733-589a-43ce-afdb-a96c707f9d73" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6abf4dee-e0bb-442f-a6d7-3f98f4c518b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_NetIncomeLoss_6abf4dee-e0bb-442f-a6d7-3f98f4c518b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_d16aac77-0988-46af-b1dd-2ad1bb7b1ac7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_DepreciationAndAmortization_d16aac77-0988-46af-b1dd-2ad1bb7b1ac7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_00ad6099-7d92-4b48-bbe1-61941b458db0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_AssetImpairmentCharges_00ad6099-7d92-4b48-bbe1-61941b458db0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_a2a161b9-01d5-42cf-a1f0-bdee022686e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_ShareBasedCompensation_a2a161b9-01d5-42cf-a1f0-bdee022686e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_add35699-cc00-430b-bdf9-14f1597f55f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_add35699-cc00-430b-bdf9-14f1597f55f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_d4d2dbfc-82d7-4854-a165-b793e4560632" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryWriteDown"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_InventoryWriteDown_d4d2dbfc-82d7-4854-a165-b793e4560632" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_798c0f2b-5435-45a7-9390-34e320b1bef9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_798c0f2b-5435-45a7-9390-34e320b1bef9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_6dc8b071-4575-4812-9e62-7fa929a814a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_6dc8b071-4575-4812-9e62-7fa929a814a1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_0e831f69-c0ce-4074-bc1a-7d5ba8ea6a26" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_0e831f69-c0ce-4074-bc1a-7d5ba8ea6a26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_6fa28499-aad5-4d26-8ecc-a3a08374747c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_6fa28499-aad5-4d26-8ecc-a3a08374747c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_b5e1e6cc-ee54-46cb-8e13-66496db3bad4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_b5e1e6cc-ee54-46cb-8e13-66496db3bad4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_e278262e-0755-40d9-8f22-a81c1d94b93a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_e278262e-0755-40d9-8f22-a81c1d94b93a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_2c847c9b-89c1-4254-803b-acc7cea6161f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_01bd3e6b-1689-48b7-bbac-78286f9ea6a5" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_2c847c9b-89c1-4254-803b-acc7cea6161f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/MergerandIntegrationCostsScheduleofCostsDetails" xlink:type="simple" xlink:href="klxe-20210430.xsd#MergerandIntegrationCostsScheduleofCostsDetails"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/MergerandIntegrationCostsScheduleofCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_klxe_BusinessCombinationAcquisitionAndIntegrationRelatedCosts_15a492ca-a1cd-48d7-9f09-1f5f185f9c89" xlink:href="klxe-20210430.xsd#klxe_BusinessCombinationAcquisitionAndIntegrationRelatedCosts"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_3414e878-b167-4df0-8211-7436634c6dd5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_klxe_BusinessCombinationAcquisitionAndIntegrationRelatedCosts_15a492ca-a1cd-48d7-9f09-1f5f185f9c89" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_3414e878-b167-4df0-8211-7436634c6dd5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_64e5dfe8-2d8f-4fab-9764-7377fd448a53" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_klxe_BusinessCombinationAcquisitionAndIntegrationRelatedCosts_15a492ca-a1cd-48d7-9f09-1f5f185f9c89" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_64e5dfe8-2d8f-4fab-9764-7377fd448a53" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/InventoriesnetScheduleofInventoryDetails" xlink:type="simple" xlink:href="klxe-20210430.xsd#InventoriesnetScheduleofInventoryDetails"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/InventoriesnetScheduleofInventoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_5259a64e-c088-4779-b216-cbd2e1987e72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryGross_8c7aeadc-af26-40c7-aa33-95759041e49a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_5259a64e-c088-4779-b216-cbd2e1987e72" xlink:to="loc_us-gaap_InventoryGross_8c7aeadc-af26-40c7-aa33-95759041e49a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserves_61dc4a0f-38af-4fa8-9f69-978264e316a3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryValuationReserves"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_5259a64e-c088-4779-b216-cbd2e1987e72" xlink:to="loc_us-gaap_InventoryValuationReserves_61dc4a0f-38af-4fa8-9f69-978264e316a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryGross_af56dd25-8be3-4fb3-92f5-a24f4232717b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventorySupplies_70833f47-8dfa-4b1c-a9b5-f8f5d8c70e29" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherInventorySupplies"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_af56dd25-8be3-4fb3-92f5-a24f4232717b" xlink:to="loc_us-gaap_OtherInventorySupplies_70833f47-8dfa-4b1c-a9b5-f8f5d8c70e29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterials_5383a832-7438-4b5e-8645-b4f233987139" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryRawMaterials"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_af56dd25-8be3-4fb3-92f5-a24f4232717b" xlink:to="loc_us-gaap_InventoryRawMaterials_5383a832-7438-4b5e-8645-b4f233987139" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoods_528295eb-dbb8-486c-81ef-7a70b807b3a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryFinishedGoods"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_af56dd25-8be3-4fb3-92f5-a24f4232717b" xlink:to="loc_us-gaap_InventoryFinishedGoods_528295eb-dbb8-486c-81ef-7a70b807b3a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventory_61d8f3ad-51b1-4401-be9e-1ab3a818964e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherInventory"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_af56dd25-8be3-4fb3-92f5-a24f4232717b" xlink:to="loc_us-gaap_OtherInventory_61d8f3ad-51b1-4401-be9e-1ab3a818964e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/PropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="klxe-20210430.xsd#PropertyandEquipmentNetDetails"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/PropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_57041776-57eb-42d7-8b70-649c82ecbaca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_17967235-7133-4c79-915c-66cc55186c98" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_57041776-57eb-42d7-8b70-649c82ecbaca" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_17967235-7133-4c79-915c-66cc55186c98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8c73091d-dd52-4a87-85a1-1a48af74e074" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_57041776-57eb-42d7-8b70-649c82ecbaca" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8c73091d-dd52-4a87-85a1-1a48af74e074" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/AccruedLiabilitiesDetails" xlink:type="simple" xlink:href="klxe-20210430.xsd#AccruedLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/AccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c711a12e-b30e-4b58-bbac-9c6d5fcc901a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c711a12e-b30e-4b58-bbac-9c6d5fcc901a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedBonusesCurrent_2b7f1c5f-204b-416d-8ec4-f930bb51668c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedBonusesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:to="loc_us-gaap_AccruedBonusesCurrent_2b7f1c5f-204b-416d-8ec4-f930bb51668c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_0d9ad984-2fe8-417d-8e5e-0a86dc99e08f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:to="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_0d9ad984-2fe8-417d-8e5e-0a86dc99e08f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_00b6c762-4bd3-48f0-9358-bf125fe2a7bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_00b6c762-4bd3-48f0-9358-bf125fe2a7bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_klxe_AccruedLeaseTerminationCostsCurrent_f66fb017-f4eb-4797-a643-38985c3378bd" xlink:href="klxe-20210430.xsd#klxe_AccruedLeaseTerminationCostsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_7f1f5324-d823-4a9e-b2ac-689e985773db" xlink:to="loc_klxe_AccruedLeaseTerminationCostsCurrent_f66fb017-f4eb-4797-a643-38985c3378bd" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.klx.com/role/NetLossPerCommonShareComputationsofBasicandDilutedEarningsPerShareDetails" xlink:type="simple" xlink:href="klxe-20210430.xsd#NetLossPerCommonShareComputationsofBasicandDilutedEarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.klx.com/role/NetLossPerCommonShareComputationsofBasicandDilutedEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_540a73f0-ec33-4b67-b909-137c60b8365f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3533eac0-9dac-4be5-ae18-4056ee94acae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_540a73f0-ec33-4b67-b909-137c60b8365f" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3533eac0-9dac-4be5-ae18-4056ee94acae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_e61f6af6-afa8-4355-8237-86709e48abe9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_540a73f0-ec33-4b67-b909-137c60b8365f" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_e61f6af6-afa8-4355-8237-86709e48abe9" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
