What Is an Auto Loan Calculator?
An auto loan calculator estimates your monthly car payment, total interest charges, and overall loan cost after accounting for down payments, trade-in credit, interest rate, and financing term.
How to Save Money on Car Financing
- Increase Down Payment: A larger down payment reduces the principal amount financed, cutting total interest paid.
- Choose Shorter Loan Terms: Opting for 48 or 60 months instead of 72 or 84 months dramatically reduces total interest costs.
- Check Credit Scores First: Pre-approving with credit unions often yields better rates than dealership financing.
Formula
Net Principal = Vehicle Price − Down Payment − Trade-in Value
Monthly Payment = Principal × [r(1+r)^n] / [(1+r)^n − 1]
Worked Example
For a $28,000 car with $4,000 down payment and $2,000 trade-in at 6.5% interest over 60 months:
Amount Financed: $22,000. Monthly Payment: $430.40. Total Interest: $3,823.82.