Auto Loan Calculator
Estimate the monthly payment, total interest and full cost of a car loan, including your trade-in, sales tax and dealer fees.
Finance calculators
Loan and vehicle-finance calculators that show the formula, the assumptions and the full schedule behind every number.
Loans and vehicle finance
Work out a payment, see what paying early saves, or compare offers side by side. All three use the same tested amortization engine.
Early Loan Payoff Calculator
See how much interest and time you save by paying extra each month or making a one-time payment toward a fixed-rate loan.
Loan Comparison Calculator
Compare up to three loan offers side by side, including origination and other fees, to see which one actually costs the least.
Which calculator do you need?
- Buying a car and want to know the monthly payment and total cost?Auto Loan Calculator
- Already have a loan and want to know what extra payments save?Early Loan Payoff Calculator
- Choosing between offers with different rates, terms or fees?Loan Comparison Calculator
How these calculators work
Every loan calculator here treats the APR as a nominal annual rate compounded monthly, assumes end-of-month payments, rounds interest to the cent each month and lets the final payment absorb any rounding. Calculations use exact decimal arithmetic, not floating point.
Results are estimates. Lenders may accrue interest daily or round differently, so contracts can differ by small amounts. Each calculator page lists its specific assumptions, limitations and sources.