Auto Calculator Bankrate

This auto calculator helps you determine monthly payments, total interest, and other key metrics for auto loans. Whether you're comparing financing options or planning your budget, this tool provides clear insights into your auto financing decisions.

How to Use This Auto Calculator

Using our auto calculator is simple. Follow these steps to get accurate results:

Enter the loan amount you're considering
Input the annual interest rate (APR)
Specify the loan term in years
Enter any down payment amount
Select the loan type (new or used)
Click "Calculate" to see your results

The calculator will display your monthly payment, total interest paid, total amount paid, and an amortization schedule chart.

Formula Used

The auto loan payment is calculated using the standard loan payment formula:

Monthly Payment = P × [r(1 + r)^n] / [(1 + r)^n - 1]

Where:

P = Principal loan amount (loan amount - down payment)
r = Monthly interest rate (annual rate / 12)
n = Number of payments (loan term in years × 12)

This formula accounts for the periodic interest on the remaining balance, which is why the monthly payment decreases over time as you pay down the loan.

Worked Example

Let's calculate a $25,000 auto loan with a 4.5% APR over 5 years:

Principal (P) = $25,000
Monthly interest rate (r) = 4.5% / 12 = 0.00375
Number of payments (n) = 5 × 12 = 60
Plugging into the formula: $25,000 × [0.00375(1 + 0.00375)^60] / [(1 + 0.00375)^60 - 1]
This equals approximately $452.38 per month

Over the 5-year term, you would pay a total of $27,142.80 with $2,142.80 going to interest.

Auto Loan Comparison

Compare different auto loan scenarios to find the best financing option:

Loan Amount	Interest Rate	Term	Monthly Payment	Total Interest
$25,000	4.5%	5 years	$452.38	$2,142.80
$25,000	3.9%	5 years	$436.54	$1,654.40
$25,000	4.5%	7 years	$355.96	$3,237.20

This comparison shows how even a small difference in interest rate or loan term can significantly impact your monthly payments and total interest costs.

Frequently Asked Questions

What is the difference between APR and interest rate?: The APR (Annual Percentage Rate) is the total cost of credit including all fees, while the interest rate is the actual percentage charged on the loan amount.
How does a down payment affect my loan?: A larger down payment reduces your loan amount and can lower your monthly payments and total interest costs.
What is the best loan term for an auto purchase?: The best term depends on your financial situation. Shorter terms have lower monthly payments but higher total interest, while longer terms have higher monthly payments but lower total interest.
Can I refinance my auto loan?: Yes, refinancing can lower your interest rate and monthly payments if your credit score has improved or interest rates have decreased.
What factors affect auto loan approval?: Lenders consider your credit score, income, debt-to-income ratio, employment history, and the value of the vehicle you're purchasing.