About the Auto Loan Calculator
This free auto loan calculator helps people in the United States get a quick, private estimate before they talk to a lender, insurer, employer or advisor. There is no signup, nothing is stored on our servers and every result updates instantly in your browser.
How this calculator works
Amount financed is price minus down payment. The monthly payment uses the amortization formula with the APR divided by 12.
Worked example
A $30,000 car with $3,000 down at 7.5% for 60 months costs about $541 per month and about $5,470 in total interest. Change any input above to see how the result moves, which is the fastest way to understand which factor matters most for you.
Tips to get a better result
Shorter terms cost more per month but much less in interest. Get pre-approved by a bank or credit union to negotiate from strength.
Key factors that change your result
APR, term and down payment drive the payment. Longer terms lower the monthly bill but raise total interest, and a 72-month loan can leave you owing more than the car is worth. Sales tax, registration and dealer fees are not included, so add them to the price.
Accuracy and limits
Every calculator on Tools30 uses standard published formulas combined with average US market assumptions. Real offers depend on your credit profile, state, provider and personal circumstances, so treat the output as a starting point and confirm with an official quote or a licensed professional. Read more on our methodology page.
Frequently asked questions
Is a 72-month loan a bad idea?
It lowers the payment but increases interest and the risk of owing more than the car is worth.
Should I put money down?
Yes, 10 to 20 percent reduces interest and negative equity risk.
Is the auto loan calculator free to use?
Yes. Every calculator on Tools30 is free with no registration.
Do you store the numbers I enter?
No. Calculations run in your browser and nothing you type is sent to our servers.