What is the car loan calculator?
In short
Your monthly car payment depends on the loan amount, interest rate, and term. A $25,000 loan at 7.5% APR over 60 months costs about $501/month with $5,042 in total interest. Longer terms reduce monthly payments but dramatically increase total interest paid. A 72-month loan at 7.5% on the same amount adds an extra $2,000+ in interest compared to a 48-month term.
This car loan calculator finds your monthly payment, total interest, total paid, and the true cost of the vehicle. It also shows a full amortization schedule and a donut chart of principal vs interest.
How to use this calculator
- 1Enter the car price, down payment, and trade-in value.
- 2Select the loan term (24–72 months).
- 3Enter the annual interest rate (APR).
- 4Read the monthly payment and total interest cost.
The formula
- M
- — Monthly payment
- P
- — Loan amount (price − down payment − trade-in)
- r
- — Monthly interest rate (APR ÷ 12)
- n
- — Number of monthly payments
Worked example
The scenario
$28,000 car, $3,000 down, 60-month term, 7.5% APR, no trade-in.
The result
Loan = $25,000. Monthly payment ≈ $501. Total paid ≈ $30,041. Total interest ≈ $5,041. True car cost ≈ $33,041 (price + interest).
Common use cases
- Comparing different loan terms on monthly payment and total cost
- Deciding how much to put down to reduce interest
- Evaluating the true cost of a car after financing
- Understanding how dealer rate offers compare to credit union rates
Limitations & assumptions
- Does not model dealer fees, registration, or sales tax.
- Assumes a fixed interest rate for the entire term.
- Does not model GAP insurance or extended warranty financing.
- Does not account for the car's depreciation — the true economic cost also includes value lost over time.
Frequently asked questions
Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.