Auto Loan Calculator

The Auto Loan Calculator estimates your monthly payment based on vehicle price, down payment, interest rate, and loan term. This tool helps car buyers plan their budget and understand the true cost of financing. Whether you are purchasing a new car, trading in an old vehicle, or looking to refinance, this calculator provides clear estimates to help you make smart financial decisions.

$
$
$
%
%

Adjust the down payment or trade-in value to see how they impact your monthly obligation and total interest cost.

This tool is for informational and educational purposes only. It is not a substitute for professional medical advice, screening assessment, or treatment. Always consult a qualified healthcare professional before making any health-related decisions.

This tool is for educational purposes only and is not financial advice. Actual loan terms and interest rates vary by lender and credit score. Please consult a qualified financial advisor for personalized lending guidance.

How Monthly Payment Is Calculated

Your monthly payment represents the fixed amount you pay the lender each month to pay off the loan balance plus interest. We use the standard amortization formula to determine this number accurately.

M = P [ r(1 + r)^n ] / [ (1 + r)^n – 1 ]

Where:

  • M = Monthly Payment
  • P = Principal Loan Amount
  • r = Monthly Interest Rate
  • n = Total Number of Payments
  1. Calculate the principal loan amount by adding sales tax to the vehicle price and subtracting your down payment and trade-in value.
  2. Convert your annual interest rate (APR) to a monthly rate by dividing it by 12.
  3. Multiply the total number of years in your loan term by 12 to find the total number of monthly payments.

We apply these values to the formula to spread the total cost evenly over the loan term, ensuring you pay off both interest and principal by the end date.

What Your Monthly Payment Means

This figure shows the estimated amount leaving your bank account each month for your car. Use it to see if the loan fits comfortably within your monthly budget before you visit a dealership.

Stick to Your Budget

Financial experts often recommend keeping your total monthly vehicle costs under 15% of your take-home pay. If your payment is $450 and you take home $3,000, you are in a healthy spending range.

Compare Loan Terms

A shorter loan term results in higher monthly payments but significantly lowers the total interest paid. For example, a 48-month plan might cost more per month than a 72-month plan, but it saves you hundreds of dollars over time.

Manage Total Interest

If your monthly payment is low due to a long loan term, check the total interest amount. A low monthly payment might feel good now, but it could mean you pay much more for the car than it is worth.

Important

This estimate includes principal and interest but does not cover insurance, registration, or maintenance.

Calculation logic verified using publicly available standards.

View our Accuracy & Reliability Framework →