How to use the auto loan calculator
- Enter the car price, your down payment and the APR.
- Choose the loan term.
- Open "Trade-in, sales tax and fees" if they apply.
- Press Calculate payment.
Auto Loan Calculator
Work out a monthly car payment, how much you will pay in interest and the full cost of the car, including your trade-in, sales tax and dealer fees.
- Free
- Instant
- No sign-up
How to use this calculator
- Pick what to find Choose a mode, or start with the first box.
- Enter your numbers Type your values into the boxes.
- Read the result See the answer and the working, then copy or share it.
Auto loan calculator
Enter the price, down payment, rate and term, then press Calculate payment.
Monthly payment
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How it was calculated
Frequently asked questions
How is a car payment calculated?
Payment = L × i × (1 + i)^n ÷ ((1 + i)^n − 1), with L the amount financed, i the APR ÷ 12 and n the number of months.
Does a trade-in reduce sales tax?
In most US states yes: tax is charged on the price minus the trade-in. The calculator works that way.
Is a longer loan cheaper?
The payment is lower but you pay more interest, and you may owe more than the car is worth for longer.
About these results
An estimate. A few states tax the full price before the trade-in; your dealer's figures may differ.
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