<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.5b -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#Cover" roleURI="http://cetyinc.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BalanceSheets" roleURI="http://cetyinc.com/role/BalanceSheets" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BalanceSheetsParenthetical" roleURI="http://cetyinc.com/role/BalanceSheetsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#StatementsOfOperations" roleURI="http://cetyinc.com/role/StatementsOfOperations" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#StatementsOfStockholdersEquity" roleURI="http://cetyinc.com/role/StatementsOfStockholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#StatementsOfCashFlows" roleURI="http://cetyinc.com/role/StatementsOfCashFlows" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#CybersecurityRiskManagementAndStrategyDisclosure" roleURI="http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#MaterialCybersecurityIncidentDisclosure" roleURI="http://xbrl.sec.gov/cyd/role/MaterialCybersecurityIncidentDisclosure" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#General" roleURI="http://cetyinc.com/role/General" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" roleURI="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#AccountsAndNotesReceivable" roleURI="http://cetyinc.com/role/AccountsAndNotesReceivable" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#Inventory" roleURI="http://cetyinc.com/role/Inventory" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#PropertyAndEquipment" roleURI="http://cetyinc.com/role/PropertyAndEquipment" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IntangibleAssets" roleURI="http://cetyinc.com/role/IntangibleAssets" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ConvertibleNoteReceivable" roleURI="http://cetyinc.com/role/ConvertibleNoteReceivable" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#AccruedExpenses" roleURI="http://cetyinc.com/role/AccruedExpenses" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#WarrantLiability" roleURI="http://cetyinc.com/role/WarrantLiability" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#NotesPayable" roleURI="http://cetyinc.com/role/NotesPayable" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CommitmentsAndContingencies" roleURI="http://cetyinc.com/role/CommitmentsAndContingencies" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CapitalStockTransactions" roleURI="http://cetyinc.com/role/CapitalStockTransactions" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#RelatedPartyTransactions" roleURI="http://cetyinc.com/role/RelatedPartyTransactions" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#WarrantyLiability" roleURI="http://cetyinc.com/role/WarrantyLiability" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#Non-controllingInterest" roleURI="http://cetyinc.com/role/Non-controllingInterest" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#DisposalOfSubsidiary" roleURI="http://cetyinc.com/role/DisposalOfSubsidiary" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IncomeTax" roleURI="http://cetyinc.com/role/IncomeTax" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#StatutoryReserves" roleURI="http://cetyinc.com/role/StatutoryReserves" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#Restatement" roleURI="http://cetyinc.com/role/Restatement" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#SubsequentEvents" roleURI="http://cetyinc.com/role/SubsequentEvents" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" roleURI="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#AccountsAndNotesReceivableTables" roleURI="http://cetyinc.com/role/AccountsAndNotesReceivableTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#InventoryTables" roleURI="http://cetyinc.com/role/InventoryTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#PropertyAndEquipmentTables" roleURI="http://cetyinc.com/role/PropertyAndEquipmentTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IntangibleAssetsTables" roleURI="http://cetyinc.com/role/IntangibleAssetsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ConvertibleNoteReceivableTables" roleURI="http://cetyinc.com/role/ConvertibleNoteReceivableTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#AccruedExpensesTables" roleURI="http://cetyinc.com/role/AccruedExpensesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#WarrantLiabilityTables" roleURI="http://cetyinc.com/role/WarrantLiabilityTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#NotesPayableTables" roleURI="http://cetyinc.com/role/NotesPayableTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CommitmentsAndContingenciesTables" roleURI="http://cetyinc.com/role/CommitmentsAndContingenciesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CapitalStockTransactionsTables" roleURI="http://cetyinc.com/role/CapitalStockTransactionsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#DisposalOfSubsidiaryTables" roleURI="http://cetyinc.com/role/DisposalOfSubsidiaryTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IncomeTaxTables" roleURI="http://cetyinc.com/role/IncomeTaxTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#RestatementTables" roleURI="http://cetyinc.com/role/RestatementTables" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#GeneralDetailsNarrative" roleURI="http://cetyinc.com/role/GeneralDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfFairValueOfAssetsAndLiabilitiesAcquiredDetails" roleURI="http://cetyinc.com/role/ScheduleOfFairValueOfAssetsAndLiabilitiesAcquiredDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfFinancialDataDetails" roleURI="http://cetyinc.com/role/ScheduleOfFinancialDataDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfRevenueByGeographicAreasBasedOnSalesLocationOfOurProductsDetails" roleURI="http://cetyinc.com/role/ScheduleOfRevenueByGeographicAreasBasedOnSalesLocationOfOurProductsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetailsNarrative" roleURI="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfAccountsAndNotesReceivableDetails" roleURI="http://cetyinc.com/role/ScheduleOfAccountsAndNotesReceivableDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfLeaseReceivableAssetDetails" roleURI="http://cetyinc.com/role/ScheduleOfLeaseReceivableAssetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfInventoriesDetails" roleURI="http://cetyinc.com/role/ScheduleOfInventoriesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfPropertyAndEquipmentDetails" roleURI="http://cetyinc.com/role/ScheduleOfPropertyAndEquipmentDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#PropertyAndEquipmentDetailsNarrative" roleURI="http://cetyinc.com/role/PropertyAndEquipmentDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfIntangibleAssetsDetails" roleURI="http://cetyinc.com/role/ScheduleOfIntangibleAssetsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfBusinessAcquisitionPurchasePriceAllocationDetails" roleURI="http://cetyinc.com/role/ScheduleOfBusinessAcquisitionPurchasePriceAllocationDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IntangibleAssetsDetailsNarrative" roleURI="http://cetyinc.com/role/IntangibleAssetsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfLoanReceivableAccretionScheduleDetails" roleURI="http://cetyinc.com/role/ScheduleOfLoanReceivableAccretionScheduleDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ConvertibleNoteReceivableDetailsNarrative" roleURI="http://cetyinc.com/role/ConvertibleNoteReceivableDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfAccruedExpensesDetails" roleURI="http://cetyinc.com/role/ScheduleOfAccruedExpensesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfReconciliationOfCreditLineWarrantLiabilityDetails" roleURI="http://cetyinc.com/role/ScheduleOfReconciliationOfCreditLineWarrantLiabilityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#WarrantLiabilityDetailsNarrative" roleURI="http://cetyinc.com/role/WarrantLiabilityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#NotesPayableDetailsNarrative" roleURI="http://cetyinc.com/role/NotesPayableDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfChangesInDerivativeLiabilityDetails" roleURI="http://cetyinc.com/role/ScheduleOfChangesInDerivativeLiabilityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfConvertibleNotesDetails" roleURI="http://cetyinc.com/role/ScheduleOfConvertibleNotesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfOperatingLeaseCostDetails" roleURI="http://cetyinc.com/role/ScheduleOfOperatingLeaseCostDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfLeasePaymentDetails" roleURI="http://cetyinc.com/role/ScheduleOfLeasePaymentDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CommitmentsAndContingenciesDetailsNarrative" roleURI="http://cetyinc.com/role/CommitmentsAndContingenciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfWarrantActivityDetails" roleURI="http://cetyinc.com/role/ScheduleOfWarrantActivityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#CapitalStockTransactionsDetailsNarrative" roleURI="http://cetyinc.com/role/CapitalStockTransactionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#RelatedPartyTransactionsDetailsNarrative" roleURI="http://cetyinc.com/role/RelatedPartyTransactionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#WarrantyLiabilityDetailsNarrative" roleURI="http://cetyinc.com/role/WarrantyLiabilityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#Non-controllingInterestDetailsNarrative" roleURI="http://cetyinc.com/role/Non-controllingInterestDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#DisposalOfSubsidiaryDetailsNarrative" roleURI="http://cetyinc.com/role/DisposalOfSubsidiaryDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfFairValueOfConsiderationReceivedDetails" roleURI="http://cetyinc.com/role/ScheduleOfFairValueOfConsiderationReceivedDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfReconciliationOfStatutoryTaxRateDetails" roleURI="http://cetyinc.com/role/ScheduleOfReconciliationOfStatutoryTaxRateDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfDeferredTaxAssetsAndLiabilitiesDetails" roleURI="http://cetyinc.com/role/ScheduleOfDeferredTaxAssetsAndLiabilitiesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#IncomeTaxDetailsNarrative" roleURI="http://cetyinc.com/role/IncomeTaxDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#StatutoryReservesDetailsNarrative" roleURI="http://cetyinc.com/role/StatutoryReservesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#ScheduleOfRestatementForFinancialStatementsDetails" roleURI="http://cetyinc.com/role/ScheduleOfRestatementForFinancialStatementsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#RestatementDetailsNarrative" roleURI="http://cetyinc.com/role/RestatementDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cety-20251231.xsd#SubsequentEventsDetailsNarrative" roleURI="http://cetyinc.com/role/SubsequentEventsDetailsNarrative" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BalanceSheets" xlink:title="00000002 - Statement - Consolidated Balance Sheets">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash" xlink:label="loc_us-gaapCash" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCash" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaapAccountsReceivableNetCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_AdvanceToSupplierRelatedParty" xlink:label="loc_CETYAdvanceToSupplierRelatedParty" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_CETYAdvanceToSupplierRelatedParty" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCostsCurrent" xlink:label="loc_us-gaapDeferredCostsCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapDeferredCostsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaapOtherReceivablesNetCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapOtherReceivablesNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableNetCurrent" xlink:label="loc_us-gaapNotesAndLoansReceivableNetCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapNotesAndLoansReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaapInventoryNet" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapInventoryNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaapAssetsNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaapGoodwill" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapGoodwill" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments" xlink:label="loc_us-gaapInvestments" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapInvestments" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAndOtherNoncurrentAssets" xlink:label="loc_us-gaapInvestmentsAndOtherNoncurrentAssets" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapInvestmentsAndOtherNoncurrentAssets" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent" xlink:label="loc_us-gaapNotesAndLoansReceivableNetNoncurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapNotesAndLoansReceivableNetNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNet" xlink:label="loc_us-gaapContractWithCustomerAssetNet" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapContractWithCustomerAssetNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_AdvanceToSupplierPrepayment" xlink:label="loc_CETYAdvanceToSupplierPrepayment" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_CETYAdvanceToSupplierPrepayment" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedLicenseAgreements" xlink:label="loc_us-gaapIndefiniteLivedLicenseAgreements" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapIndefiniteLivedLicenseAgreements" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_Patents" xlink:label="loc_CETYPatents" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_CETYPatents" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaapOperatingLeaseRightOfUseAsset" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapOperatingLeaseRightOfUseAsset" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:label="loc_us-gaapDepositsAssetsNoncurrent" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapDepositsAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaapAccountsPayableCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaapContractWithCustomerLiabilityCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapContractWithCustomerLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_WarrantyLiabilityCurrent" xlink:label="loc_CETYWarrantyLiabilityCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CETYWarrantyLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_WarrantLiability" xlink:label="loc_CETYWarrantLiability" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CETYWarrantLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeCurrent" xlink:label="loc_us-gaapDeferredIncomeCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapDeferredIncomeCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_us-gaapDerivativeLiabilitiesCurrent" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapDerivativeLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="loc_us-gaapLinesOfCreditCurrent" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapLinesOfCreditCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_AdvancesPaidOffRelatedParty" xlink:label="loc_CETYAdvancesPaidOffRelatedParty" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CETYAdvancesPaidOffRelatedParty" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtCurrent" xlink:label="loc_us-gaapConvertibleDebtCurrent" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapConvertibleDebtCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableCurrent" xlink:label="loc_us-gaapNotesPayableCurrent" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapNotesPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaapLiabilitiesNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaapDividendsPayableCurrentAndNoncurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapDividendsPayableCurrentAndNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaapPreferredStockValue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapPreferredStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaapMinorityInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapMinorityInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BalanceSheetsParenthetical" xlink:title="00000003 - Statement - Consolidated Balance Sheets (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/StatementsOfOperations" xlink:title="00000004 - Statement - Consolidated Statements of Operations">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaapGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaapCostOfGoodsAndServicesSold" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapCostOfGoodsAndServicesSold" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaapOperatingExpenses" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaapGeneralAndAdministrativeExpense" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapGeneralAndAdministrativeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalariesAndWages" xlink:label="loc_us-gaapSalariesAndWages" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapSalariesAndWages" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TravelAndEntertainmentExpense" xlink:label="loc_us-gaapTravelAndEntertainmentExpense" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapTravelAndEntertainmentExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaapProfessionalFees" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapProfessionalFees" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_FacilityLeaseAndMaintenance" xlink:label="loc_CETYFacilityLeaseAndMaintenance" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_CETYFacilityLeaseAndMaintenance" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ConsultingEngineering" xlink:label="loc_CETYConsultingEngineering" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_CETYConsultingEngineering" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaapDepreciationDepletionAndAmortization" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapDepreciationDepletionAndAmortization" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaapOperatingIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapGrossProfit" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapOperatingExpenses" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaapOtherNonoperatingIncomeExpense" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOtherNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaapDerivativeGainLossOnDerivativeNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapDerivativeGainLossOnDerivativeNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ChangeInFairValueOfWarrantLiability" xlink:label="loc_CETYChangeInFairValueOfWarrantLiability" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_CETYChangeInFairValueOfWarrantLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnInvestments" xlink:label="loc_us-gaapGainLossOnInvestments" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapGainLossOnInvestments" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_LossOnDebtSettlementAndWriteDown" xlink:label="loc_CETYLossOnDebtSettlementAndWriteDown" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_CETYLossOnDebtSettlementAndWriteDown" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_InterestIncome" xlink:label="loc_CETYInterestIncome" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_CETYInterestIncome" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingInterestExpense" xlink:label="loc_us-gaapFinancingInterestExpense" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapFinancingInterestExpense" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_NetLossBeforeNoncontrollingInterestFromContinuingOperations" xlink:label="loc_CETYNetLossBeforeNoncontrollingInterestFromContinuingOperations" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_CETYNetLossBeforeNoncontrollingInterestFromContinuingOperations" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaapIncomeLossFromDiscontinuedOperationsNetOfTax" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_CETYNetLossBeforeNoncontrollingInterestFromContinuingOperations" xlink:to="loc_us-gaapIncomeLossFromDiscontinuedOperationsNetOfTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaapProfitLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapProfitLoss" xlink:to="loc_CETYNetLossBeforeNoncontrollingInterestFromContinuingOperations" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_IncomeTaxExpenseBenefitBeforeNonControllingInterest" xlink:label="loc_CETYIncomeTaxExpenseBenefitBeforeNonControllingInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapProfitLoss" xlink:to="loc_CETYIncomeTaxExpenseBenefitBeforeNonControllingInterest" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapProfitLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaapComprehensiveIncomeNetOfTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaapOtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapOtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/StatementsOfStockholdersEquity" xlink:title="00000005 - Statement - Consolidated Statements of Stockholders Equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/StatementsOfCashFlows" xlink:title="00000006 - Statement - Consolidated Statements of Cash Flows">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaapDepreciation" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaapShareBasedCompensation" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapShareBasedCompensation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_InvestmentIncomeInvestmentExpenses" xlink:label="loc_CETYInvestmentIncomeInvestmentExpenses" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYInvestmentIncomeInvestmentExpenses" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeconsolidationGainOrLossAmount" xlink:label="loc_us-gaapDeconsolidationGainOrLossAmount" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDeconsolidationGainOrLossAmount" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_LossFromInvestmentOfLeadingWeaveLtd" xlink:label="loc_CETYLossFromInvestmentOfLeadingWeaveLtd" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYLossFromInvestmentOfLeadingWeaveLtd" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaapProvisionForDoubtfulAccounts" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapProvisionForDoubtfulAccounts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaapAmortizationOfDebtDiscountPremium" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapAmortizationOfDebtDiscountPremium" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDeferredCharges" xlink:label="loc_us-gaapIncreaseDecreaseInDeferredCharges" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInDeferredCharges" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDerivativeLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInDerivativeLiabilities" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInDerivativeLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ChangeInFairValueOfWarrantLiability" xlink:label="loc_CETYChangeInFairValueOfWarrantLiability" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYChangeInFairValueOfWarrantLiability" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ReversalOfInventoryImpairmentReserve" xlink:label="loc_CETYReversalOfInventoryImpairmentReserve" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYReversalOfInventoryImpairmentReserve" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_IncreaseDecreaseInRightOfUseAsset1" xlink:label="loc_CETYIncreaseDecreaseInRightOfUseAsset1" />
      <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYIncreaseDecreaseInRightOfUseAsset1" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:label="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" />
      <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsReceivable" />
      <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsReceivableRelatedParties" />
      <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsReceivableRelatedParties" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaapIncreaseDecreaseInPrepaidExpense" />
      <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInPrepaidExpense" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerAsset" xlink:label="loc_us-gaapIncreaseDecreaseInContractWithCustomerAsset" />
      <link:calculationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInContractWithCustomerAsset" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaapIncreaseDecreaseInOtherOperatingAssets" />
      <link:calculationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOtherOperatingAssets" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaapIncreaseDecreaseInInventories" />
      <link:calculationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInInventories" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayable" />
      <link:calculationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaapIncreaseDecreaseInInterestPayableNet" />
      <link:calculationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInInterestPayableNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherAccruedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInOtherAccruedLiabilities" />
      <link:calculationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOtherAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_IncreaseDecreaseInOtherPayablesRelatedParty" xlink:label="loc_CETYIncreaseDecreaseInOtherPayablesRelatedParty" />
      <link:calculationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CETYIncreaseDecreaseInOtherPayablesRelatedParty" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="loc_us-gaapIncreaseDecreaseInContractWithCustomerLiability" />
      <link:calculationArc order="25" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInContractWithCustomerLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromInvestments" xlink:label="loc_us-gaapPaymentsForProceedsFromInvestments" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapPaymentsForProceedsFromInvestments" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ProceedToHezeHongyuanNaturalGas" xlink:label="loc_CETYProceedToHezeHongyuanNaturalGas" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_CETYProceedToHezeHongyuanNaturalGas" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_ProceedsFromLoansReceivables" xlink:label="loc_CETYProceedsFromLoansReceivables" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_CETYProceedsFromLoansReceivables" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromNotesPayable" xlink:label="loc_us-gaapProceedsFromNotesPayable" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="loc_us-gaapRepaymentsOfNotesPayable" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfNotesPayable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaapProceedsFromIssuanceOfCommonStock" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromIssuanceOfCommonStock" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:label="loc_us-gaapEffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapEffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" xlink:title="00000012 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure" />
    <link:calculationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cyd/role/MaterialCybersecurityIncidentDisclosure" xlink:title="00000013 - Disclosure - Material Cybersecurity Incident Disclosure" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/General" xlink:title="999014 - Disclosure - GENERAL" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:title="999015 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/AccountsAndNotesReceivable" xlink:title="999016 - Disclosure - ACCOUNTS AND NOTES RECEIVABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/Inventory" xlink:title="999017 - Disclosure - INVENTORY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/PropertyAndEquipment" xlink:title="999018 - Disclosure - PROPERTY AND EQUIPMENT" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IntangibleAssets" xlink:title="999019 - Disclosure - INTANGIBLE ASSETS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ConvertibleNoteReceivable" xlink:title="999020 - Disclosure - CONVERTIBLE NOTE RECEIVABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/AccruedExpenses" xlink:title="999021 - Disclosure - ACCRUED EXPENSES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/WarrantLiability" xlink:title="999022 - Disclosure - WARRANT LIABILITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/NotesPayable" xlink:title="999023 - Disclosure - NOTES PAYABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CommitmentsAndContingencies" xlink:title="999024 - Disclosure - COMMITMENTS AND CONTINGENCIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CapitalStockTransactions" xlink:title="999025 - Disclosure - CAPITAL STOCK TRANSACTIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/RelatedPartyTransactions" xlink:title="999026 - Disclosure - RELATED PARTY TRANSACTIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/WarrantyLiability" xlink:title="999027 - Disclosure - WARRANTY LIABILITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/Non-controllingInterest" xlink:title="999028 - Disclosure - NON-CONTROLLING INTEREST" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/DisposalOfSubsidiary" xlink:title="999029 - Disclosure - DiSPOSAL OF SUBSIDIARY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IncomeTax" xlink:title="999030 - Disclosure - INCOME TAX" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/StatutoryReserves" xlink:title="999031 - Disclosure - THE STATUTORY RESERVES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/Restatement" xlink:title="999032 - Disclosure - RESTATEMENT" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/SubsequentEvents" xlink:title="999033 - Disclosure - SUBSEQUENT EVENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:title="999034 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:title="999035 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/AccountsAndNotesReceivableTables" xlink:title="999036 - Disclosure - ACCOUNTS AND NOTES RECEIVABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/InventoryTables" xlink:title="999037 - Disclosure - INVENTORY (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/PropertyAndEquipmentTables" xlink:title="999038 - Disclosure - PROPERTY AND EQUIPMENT (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IntangibleAssetsTables" xlink:title="999039 - Disclosure - INTANGIBLE ASSETS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ConvertibleNoteReceivableTables" xlink:title="999040 - Disclosure - CONVERTIBLE NOTE RECEIVABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/AccruedExpensesTables" xlink:title="999041 - Disclosure - ACCRUED EXPENSES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/WarrantLiabilityTables" xlink:title="999042 - Disclosure - WARRANT LIABILITY (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/NotesPayableTables" xlink:title="999043 - Disclosure - NOTES PAYABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CommitmentsAndContingenciesTables" xlink:title="999044 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CapitalStockTransactionsTables" xlink:title="999045 - Disclosure - CAPITAL STOCK TRANSACTIONS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/DisposalOfSubsidiaryTables" xlink:title="999046 - Disclosure - DiSPOSAL OF SUBSIDIARY (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IncomeTaxTables" xlink:title="999047 - Disclosure - INCOME TAX (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/RestatementTables" xlink:title="999048 - Disclosure - RESTATEMENT (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/GeneralDetailsNarrative" xlink:title="999049 - Disclosure - GENERAL (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfFairValueOfAssetsAndLiabilitiesAcquiredDetails" xlink:title="999050 - Disclosure - SCHEDULE OF FAIR VALUE OF ASSETS AND LIABILITIES ACQUIRED (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfFinancialDataDetails" xlink:title="999051 - Disclosure - SCHEDULE OF FINANCIAL DATA (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfRevenueByGeographicAreasBasedOnSalesLocationOfOurProductsDetails" xlink:title="999052 - Disclosure - SCHEDULE OF REVENUE BY GEOGRAPHIC AREAS BASED ON SALES LOCATION OF OUR PRODUCTS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:title="999053 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfAccountsAndNotesReceivableDetails" xlink:title="999054 - Disclosure - SCHEDULE OF ACCOUNTS AND NOTES RECEIVABLE (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaapAccountsReceivableNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGross" xlink:label="loc_us-gaapAccountsReceivableGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccountsReceivableNet" xlink:to="loc_us-gaapAccountsReceivableGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_AccountsReceivableRelatedParty" xlink:label="loc_CETYAccountsReceivableRelatedParty" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccountsReceivableNet" xlink:to="loc_CETYAccountsReceivableRelatedParty" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaapAllowanceForDoubtfulAccountsReceivableCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccountsReceivableNet" xlink:to="loc_us-gaapAllowanceForDoubtfulAccountsReceivableCurrent" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfLeaseReceivableAssetDetails" xlink:title="999055 - Disclosure - SCHEDULE OF LEASE RECEIVABLE ASSET (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableNetCurrent" xlink:label="loc_us-gaapNotesAndLoansReceivableNetCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableGrossCurrent" xlink:label="loc_us-gaapNotesAndLoansReceivableGrossCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNotesAndLoansReceivableNetCurrent" xlink:to="loc_us-gaapNotesAndLoansReceivableGrossCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:label="loc_us-gaapAllowanceForNotesAndLoansReceivableCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNotesAndLoansReceivableNetCurrent" xlink:to="loc_us-gaapAllowanceForNotesAndLoansReceivableCurrent" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfInventoriesDetails" xlink:title="999056 - Disclosure - SCHEDULE OF INVENTORIES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaapInventoryNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryGross" xlink:label="loc_us-gaapInventoryGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapInventoryNet" xlink:to="loc_us-gaapInventoryGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryValuationReserves" xlink:label="loc_us-gaapInventoryValuationReserves" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapInventoryNet" xlink:to="loc_us-gaapInventoryValuationReserves" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfPropertyAndEquipmentDetails" xlink:title="999057 - Disclosure - SCHEDULE OF PROPERTY AND EQUIPMENT (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaapPropertyPlantAndEquipmentGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapPropertyPlantAndEquipmentGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/PropertyAndEquipmentDetailsNarrative" xlink:title="999058 - Disclosure - PROPERTY AND EQUIPMENT (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfIntangibleAssetsDetails" xlink:title="999059 - Disclosure - SCHEDULE OF INTANGIBLE ASSETS (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:label="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaapGoodwill" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" xlink:to="loc_us-gaapGoodwill" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIntangibleAssetsNet" xlink:label="loc_us-gaapOtherIntangibleAssetsNet" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" xlink:to="loc_us-gaapOtherIntangibleAssetsNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedLicenseAgreements" xlink:label="loc_us-gaapIndefiniteLivedLicenseAgreements" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" xlink:to="loc_us-gaapIndefiniteLivedLicenseAgreements" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedPatentsGross" xlink:label="loc_us-gaapFiniteLivedPatentsGross" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" xlink:to="loc_us-gaapFiniteLivedPatentsGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaapFiniteLivedIntangibleAssetsAccumulatedAmortization" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIntangibleAssetsNetIncludingGoodwill" xlink:to="loc_us-gaapFiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfBusinessAcquisitionPurchasePriceAllocationDetails" xlink:title="999060 - Disclosure - SCHEDULE OF BUSINESS ACQUISITION PURCHASE PRICE ALLOCATION (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IntangibleAssetsDetailsNarrative" xlink:title="999061 - Disclosure - INTANGIBLE ASSETS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfLoanReceivableAccretionScheduleDetails" xlink:title="999062 - Disclosure - SCHEDULE OF LOAN RECEIVABLE ACCRETION SCHEDULE (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ConvertibleNoteReceivableDetailsNarrative" xlink:title="999063 - Disclosure - CONVERTIBLE NOTE RECEIVABLE (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfAccruedExpensesDetails" xlink:title="999064 - Disclosure - SCHEDULE OF ACCRUED EXPENSES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="loc_us-gaapAccruedSalariesCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedSalariesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="loc_us-gaapSalesAndExciseTaxPayableCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapSalesAndExciseTaxPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaapOtherAccruedLiabilitiesCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapOtherAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfReconciliationOfCreditLineWarrantLiabilityDetails" xlink:title="999065 - Disclosure - SCHEDULE OF RECONCILIATION OF CREDIT LINE WARRANT LIABILITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/WarrantLiabilityDetailsNarrative" xlink:title="999066 - Disclosure - WARRANT LIABILITY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/NotesPayableDetailsNarrative" xlink:title="999067 - Disclosure - NOTES PAYABLE (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfChangesInDerivativeLiabilityDetails" xlink:title="999068 - Disclosure - SCHEDULE OF CHANGES IN DERIVATIVE LIABILITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfConvertibleNotesDetails" xlink:title="999069 - Disclosure - SCHEDULE OF CONVERTIBLE NOTES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableCurrent" xlink:label="loc_us-gaapConvertibleNotesPayableCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaapDebtInstrumentCarryingAmount" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapConvertibleNotesPayableCurrent" xlink:to="loc_us-gaapDebtInstrumentCarryingAmount" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaapInterestPayableCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapConvertibleNotesPayableCurrent" xlink:to="loc_us-gaapInterestPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="loc_us-gaapDebtInstrumentUnamortizedDiscountPremiumNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapConvertibleNotesPayableCurrent" xlink:to="loc_us-gaapDebtInstrumentUnamortizedDiscountPremiumNet" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_AmortizationOfDebtDiscount" xlink:label="loc_CETYAmortizationOfDebtDiscount" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapConvertibleNotesPayableCurrent" xlink:to="loc_CETYAmortizationOfDebtDiscount" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfOperatingLeaseCostDetails" xlink:title="999070 - Disclosure - SCHEDULE OF OPERATING LEASE COST (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaapOperatingLeaseLiability" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingLeaseLiability" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingLeaseLiability" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfLeasePaymentDetails" xlink:title="999071 - Disclosure - SCHEDULE OF LEASE PAYMENT (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CommitmentsAndContingenciesDetailsNarrative" xlink:title="999072 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfWarrantActivityDetails" xlink:title="999073 - Disclosure - SCHEDULE OF WARRANT ACTIVITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/CapitalStockTransactionsDetailsNarrative" xlink:title="999074 - Disclosure - CAPITAL STOCK TRANSACTIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="999075 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/WarrantyLiabilityDetailsNarrative" xlink:title="999076 - Disclosure - WARRANTY LIABILITY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/Non-controllingInterestDetailsNarrative" xlink:title="999077 - Disclosure - NON-CONTROLLING INTEREST (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/DisposalOfSubsidiaryDetailsNarrative" xlink:title="999078 - Disclosure - DiSPOSAL OF SUBSIDIARY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfFairValueOfConsiderationReceivedDetails" xlink:title="999079 - Disclosure - SCHEDULE OF FAIR VALUE OF CONSIDERATION RECEIVED (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfReconciliationOfStatutoryTaxRateDetails" xlink:title="999080 - Disclosure - SCHEDULE OF RECONCILIATION OF STATUTORY TAX RATE (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_EffectiveIncomeTaxesRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_CETYEffectiveIncomeTaxesRateReconciliationStateAndLocalIncomeTaxes" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_CETYEffectiveIncomeTaxesRateReconciliationStateAndLocalIncomeTaxes" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRatePermanentDifferential" xlink:label="loc_CETYEffectiveIncomeTaxRateReconciliationForeignIncomeTaxRatePermanentDifferential" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_CETYEffectiveIncomeTaxRateReconciliationForeignIncomeTaxRatePermanentDifferential" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfDeferredTaxAssetsAndLiabilitiesDetails" xlink:title="999081 - Disclosure - SCHEDULE OF DEFERRED TAX ASSETS AND LIABILITIES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaapDeferredTaxAssetsGross" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwards" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwards" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsInventory" xlink:label="loc_us-gaapDeferredTaxAssetsInventory" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsInventory" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments" xlink:label="loc_us-gaapDeferredTaxAssetsDerivativeInstruments" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsDerivativeInstruments" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_OperatingLeaseLiabilitiesNetOfRightOfUseAssets" xlink:label="loc_CETYOperatingLeaseLiabilitiesNetOfRightOfUseAssets" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_CETYOperatingLeaseLiabilitiesNetOfRightOfUseAssets" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_WarrantLiabilities" xlink:label="loc_CETYWarrantLiabilities" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_CETYWarrantLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaapDeferredTaxAssetsNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsNet" xlink:to="loc_us-gaapDeferredTaxAssetsGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaapDeferredTaxAssetsValuationAllowance" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsNet" xlink:to="loc_us-gaapDeferredTaxAssetsValuationAllowance" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaapDeferredTaxAssetsLiabilitiesNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsLiabilitiesNet" xlink:to="loc_us-gaapDeferredTaxAssetsNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaapDeferredIncomeTaxLiabilities" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsLiabilitiesNet" xlink:to="loc_us-gaapDeferredIncomeTaxLiabilities" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cety-20251231.xsd#CETY_LicenseAndPatents" xlink:label="loc_CETYLicenseAndPatents" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsLiabilitiesNet" xlink:to="loc_CETYLicenseAndPatents" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/IncomeTaxDetailsNarrative" xlink:title="999082 - Disclosure - INCOME TAX (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/StatutoryReservesDetailsNarrative" xlink:title="999083 - Disclosure - THE STATUTORY RESERVES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/ScheduleOfRestatementForFinancialStatementsDetails" xlink:title="999084 - Disclosure - SCHEDULE OF RESTATEMENT FOR THE FINANCIAL STATEMENTS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/RestatementDetailsNarrative" xlink:title="999085 - Disclosure - RESTATEMENT (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cetyinc.com/role/SubsequentEventsDetailsNarrative" xlink:title="999086 - Disclosure - SUBSEQUENT EVENTS (Details Narrative)" />
</link:linkbase>
