Calculators Lab
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Car Loan Calculator

Know the real monthly cost of any car before you walk into the dealership.

Adjust your inputs

Results update instantly as you type or drag.

500500,000
$
0200,000
$
0100,000
$

Value of vehicle you're trading in

030
%
1296

Quick insights

Total interest

$5,642

Total cost

$40,642

Quick answer

How do you calculate a car loan payment?

Monthly Payment = Loan × r(1+r)^n / ((1+r)^n − 1). The loan amount is price minus down payment and trade-in value.

How it works

From inputs to result in four steps

A quick walkthrough of what this calculator does behind the scenes.

  1. 1

    Enter the car price.

  2. 2

    Add your down payment and trade-in value.

  3. 3

    Enter the annual interest rate.

  4. 4

    Set the loan term (36–72 months is typical).

Formula

The math behind the number

No black box — here's exactly how the result is computed.

Formula

Loan = Car price − down payment − trade-in
r = Annual rate ÷ 12 ÷ 100
n = Term in months

Monthly Payment = Loan × r × (1 + r)^n
                  ─────────────────────
                     (1 + r)^n − 1

Examples

Real-world scenarios

See how the numbers play out for typical use cases.

Scenario 1

New car

$35,000, $5,000 down, 7% rate, 60 months → $594/month, $5,640 in interest.

Scenario 2

Used car

$18,000, $3,000 down, 9% rate, 48 months → $374/month, $2,952 in interest.