AutoLoanLabs calculators
Auto loan calculators for 2026.
Choose the tool that matches the car-buying question in front of you.
How to choose
Pick the calculator that matches your question.
Use the auto loan calculator with trade-in when you have a vehicle price and want amount financed, monthly payment, and interest after trade-in equity. Use the car affordability calculator when you only know a monthly budget. Use the negative equity car loan calculator when payoff is higher than trade-in value.
Net trade-in equity = trade-in value − remaining payoff. Positive equity can lower the new loan; negative equity can raise it if rolled into the deal. For the allocation choice between cash and equity, read does a trade-in count as a down payment.
Start with a calculation
Tools for the numbers that change your payment.
These 2026 car finance planning tools show the inputs, formula, assumptions, and estimated payoff schedule so you can compare a loan before discussing a deal. The year label does not represent a live lender rate or approval.
Estimate payment, amount financed, interest, and amortization with trade-in value, payoff, down payment, APR, taxes, and fees.
Monthly budget first Car Affordability CalculatorStart with a payment budget and estimate the vehicle price that may fit after APR, term, equity, taxes, and fees.
Longer loan term 72 Month Auto Loan CalculatorCompare the lower monthly payment with the additional interest that can come with a 72-month auto loan.
Trade-in payoff is higher Negative Equity Car Loan CalculatorEstimate how an upside-down trade-in payoff can change the new amount financed, payment, and total interest.
Existing loan Auto Loan Refinance CalculatorCompare your current payment with a new APR, term, fees, interest, and estimated total savings.
Pay it off sooner Auto Loan Early Payoff CalculatorEstimate months saved and interest saved with extra monthly payments or a lump sum.
Understand the inputs
Guides for trade-in and payment decisions.
Use these plain-English explainers when the calculation depends on equity, an old payoff, or the difference between cash down and a trade-in.
See when trade-in equity lowers the new loan balance and when an old payoff changes the result.
Down payment question Does a Trade-In Count as a Down Payment?Compare cash down, positive trade-in equity, break-even trade-ins, and negative equity.
Remaining loan payoff Trading In a Car You Still Owe Money OnWork through payoff, trade-in value, and the shortfall that may be rolled into a new loan.
Shared math
What every payment estimate uses.
Amount financed = vehicle price − down payment − net trade-in equity + financed taxes and fees. Monthly payment uses the fixed-rate amortization formula M = P × r(1+r)n / ((1+r)n − 1), where P is amount financed, r is the monthly rate, and n is the number of payments.
Default APR references on the tools are national planning starting points, not personalized quotes. Verify actual APR, fees, first-payment timing, and Truth in Lending disclosures with lenders.
A clear starting point
Estimate first. Compare terms second.
AutoLoanLabs calculators are planning tools, not lender quotes. Your actual offer can differ based on credit, lender rules, taxes, fees, vehicle value, and the final contract.
For a transparent estimate, start with the auto loan calculator with trade-in. If you are deciding what vehicle price fits a monthly budget, start with the car affordability calculator. If the old payoff exceeds trade-in value, go to the negative equity calculator.
About the publisher and review process: About AutoLoanLabs.
FAQ
Common calculator questions.
Which auto loan calculator should I use first?
Start with the auto loan calculator with trade-in if you have a vehicle price. Use affordability if you only know a monthly budget. Use negative equity when trade-in payoff is higher than trade-in value.
What is net trade-in equity?
Trade-in value minus remaining payoff. Positive equity can reduce amount financed. Negative equity can increase it if rolled into the new loan. See how trade-in value affects payments.
Are these lender quotes or approvals?
No. Results are free browser-side planning estimates only. They are not financial advice, loan approval, or an offer of credit.