Auto Loan Calculator

Auto Loan Amount ($) Enter a valid loan amount.

Annual Interest Rate (%) Enter a valid interest rate.

Loan Term (years) Enter a valid loan term.

Monthly Payment

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Total Interest Paid

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Total Amount Paid

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How to Use This Tool

Enter the total auto loan amount you plan to borrow.
Enter the annual interest rate offered by your lender.
Enter the loan term in years.
Click Calculate Payment to see your monthly payment, total interest, and total amount paid over the life of the loan.

The Loan Payment Formula

Monthly loan payments are calculated using the standard amortization formula:

M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1]

Where M is the monthly payment, P is the loan principal, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments (years × 12).

Why This Formula Works

This formula ensures that each fixed monthly payment covers that month's interest charge plus a portion of the principal, structured so the loan balance reaches exactly zero at the end of the term — a process called amortization. In the early years of a loan, a larger share of each payment goes toward interest; over time, more goes toward principal.

Reducing Your Auto Loan Cost

A larger down payment, a shorter loan term, or a higher credit score (which typically qualifies you for a lower interest rate) can all significantly reduce the total interest you pay over the life of an auto loan.

Factors That Affect Your Payment

Interest rate: Even a small rate difference compounds significantly over a long loan term
Loan term: A longer term lowers your monthly payment but increases total interest paid over the life of the loan
Loan amount: Directly proportional to your payment — a larger loan means a larger payment at the same rate and term

Frequently Asked Questions

What is the formula used to calculate my monthly payment?

M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1], where P is the loan amount, r is the monthly interest rate, and n is the total number of monthly payments.

Does a longer loan term always cost more overall?

Yes — while a longer term reduces your monthly payment, you pay interest for more months, which increases the total interest paid over the life of the loan, even at the same interest rate.

Should I include my trade-in value in the loan amount?

No — subtract your trade-in value and down payment from the vehicle price first, and enter only the remaining amount you need to finance.

What is a typical auto loan term?

Common auto loan terms range from 36 to 72 months (3 to 6 years), though some lenders offer longer terms which reduce monthly payments but increase total interest paid.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.