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How to Calculate Auto Loans

What is Auto Loans?

An auto loan is a secured loan where the vehicle serves as collateral. If you stop making payments, the lender can repossess the car. Auto loan rates depend on credit score, loan term, down payment, and whether the car is new or used.

Formula

Monthly payment = P × r(1+r)^n / ((1+r)^n - 1)
P
Loan amount — Loan amount

Step-by-Step Guide

  1. 1Monthly payment = P × r(1+r)^n / ((1+r)^n - 1)
  2. 2P = Loan amount, r = monthly rate, n = months
  3. 3Total interest = (Monthly payment × months) - Loan amount
  4. 4Longer terms lower monthly payments but greatly increase total interest

Worked Examples

Input
$25,000 at 6.5% for 60 months
Result
$487/month · Total interest: $4,220
5-year typical auto loan
Input
Same loan for 72 months
Result
$414/month · Total interest: $5,808
Lower payment but £1,588 more interest

Frequently Asked Questions

What is Auto Loan Is A Secured Loan Where The Vehicle Serves As Collateral?

An auto loan is a secured loan where the vehicle serves as collateral. If you stop making payments, the lender can repossess the car

How accurate is the Auto Loan Is A Secured Loan Where The Vehicle Serves As Collateral calculator?

The calculator uses the standard published formula for auto loan is a secured loan where the vehicle serves as collateral. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Auto Loan Is A Secured Loan Where The Vehicle Serves As Collateral calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Auto Loan Is A Secured Loan Where The Vehicle Serves As Collateral calculator use?

The core formula is: Monthly payment = P × r(1+r)^n / ((1+r)^n - 1). Each step in the calculation is shown so you can verify the result manually.

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