🚗 Car Loan Interest Calculator
Calculate your monthly car payment and the total interest you’ll pay over the life of an auto loan.
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Calculating car loan payments
This calculator estimates your monthly auto loan payment and the total interest you’ll pay over the life of the loan, based on the vehicle price, your down payment, the interest rate, and loan term.
The formula
Amount Financed = Vehicle Price − Down Payment. Monthly Payment = Amount Financed × r × (1+r)^n / ((1+r)^n − 1), where r is the monthly interest rate and n is the number of monthly payments. Total interest is the total of all payments minus the amount financed.
This tool is for general planning purposes. Actual loan offers may include fees, taxes, and rounding conventions that cause small differences from this estimate.
Last reviewed August 2026