Auto Loan Calculator
Calculate your Car payment estimate in seconds with the free Auto Loan Calculator. No registration needed.
Vehicle & loan
Your payment
What is an Auto Loan Calculator?
An Auto Loan Calculator estimates your monthly car payment based on the vehicle price, down payment, trade-in value, interest rate, loan term, sales tax, and fees. It helps you budget for a new or used car purchase by showing exactly what each payment will look like.
How to calculate auto loan manually (the formula)
The standard loan formula is: M = P [ r(1+r)n ] / [ (1+r)n – 1 ] where M is the monthly payment, P is the amount financed (vehicle price + tax + fees − down payment − trade-in equity), r is the monthly interest rate (APR ÷ 12), and n is the number of monthly payments (term in months).
Example calculation
For a $32,000 vehicle with a $4,000 down payment, 6% sales tax, $500 in fees, and a 7.5% APR over 60 months: the amount financed is $30,420. The monthly payment is about $610. The total interest paid over 60 months is roughly $6,170.
Common mistakes
- Focusing only on the monthly payment — A 72-month loan has a lower payment than a 48-month loan but costs thousands more in interest.
- Negotiating based on monthly payment — Dealers may extend the term to keep payments low while hiding a higher price or rate. Negotiate the out-the-door price first.
- Ignoring the trade-in value — Your trade-in reduces the amount financed. Check its market value before visiting the dealership.
- Not shopping for rates — Getting pre-approved by a bank or credit union gives you leverage and may secure a lower rate than the dealer offers.
- Rolling negative equity into a new loan — If you owe more than your trade is worth, that negative equity gets added to the new loan, increasing the total cost.
Frequently asked questions
How does an auto loan calculator work?
An auto loan calculator estimates your monthly car payment using the vehicle price, down payment, trade-in value, interest rate, loan term, sales tax, and fees. It applies the standard loan formula to determine the payment amount.
What is a good APR for a car loan?
A good APR depends on your credit score, the loan term, and current market rates. As of 2026, borrowers with excellent credit (720+) may qualify for rates around 5–7%, while those with lower credit may see rates above 10%.
Should I choose a longer or shorter loan term?
A shorter term (36–48 months) means higher monthly payments but less total interest. A longer term (60–84 months) lowers the monthly payment but costs more in interest over time.
How does a trade-in affect my car loan?
A trade-in reduces the amount you need to finance. If you have positive equity (your trade is worth more than you owe), that value is subtracted from the vehicle price, lowering your loan amount and monthly payment.
Is this calculator free to use?
Yes, completely free with no sign-up or download required. You can use it as many times as you like.