Calculate Auto Loan

Calculating your auto loan helps you understand your monthly payments, total interest, and the true cost of financing your vehicle. This calculator provides a clear breakdown of your loan terms and helps you compare different financing options.

How to Use This Calculator

To calculate your auto loan, follow these simple steps:

Enter the loan amount (the price of the vehicle).
Enter the interest rate (APR) offered by the lender.
Enter the loan term in years.
Select the loan type (fixed or variable).
Click "Calculate" to see your monthly payment and total cost.

The calculator will display your estimated monthly payment, total interest paid, and the total amount you'll pay over the life of the loan.

Formula Used

The monthly payment for an auto loan is calculated using the standard loan payment formula:

Monthly Payment Formula

M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]

Where:

M = Monthly payment
P = Principal loan amount
i = Monthly interest rate (annual rate divided by 12)
n = Number of payments (loan term in years multiplied by 12)

This formula accounts for the interest charged on the outstanding loan balance each month, which is why the monthly payment remains the same for a fixed-rate loan.

Worked Example

Let's calculate a monthly payment for a $25,000 loan with a 4.5% annual interest rate over 5 years.

Convert the annual interest rate to a monthly rate: 4.5% ÷ 12 = 0.375% or 0.00375 in decimal form.
Calculate the number of payments: 5 years × 12 = 60 payments.
Plug the values into the formula:

M = $25,000 [ 0.00375(1 + 0.00375)^60 ] / [ (1 + 0.00375)^60 - 1 ]
The calculation results in a monthly payment of approximately $462.45.

Over 5 years, you would pay a total of $27,747.00, with $2,747.00 going to interest.

Loan Comparison Table

Compare different loan options to find the best deal for your situation.

Loan Amount	Interest Rate	Term (Years)	Monthly Payment	Total Interest
$25,000	4.5%	5	$462.45	$2,747.00
$25,000	3.9%	5	$448.76	$2,208.00
$25,000	4.5%	7	$367.69	$3,703.00

This table shows how different interest rates and loan terms affect your monthly payments and total interest costs.

Frequently Asked Questions

What is the difference between APR and interest rate?: The annual percentage rate (APR) is the total cost of credit, including any fees, while the interest rate is the cost of borrowing without fees. APR is always higher than the interest rate.
How does a variable interest rate affect my payments?: With a variable rate loan, your interest rate can change over time. If rates rise, your monthly payments will increase. If rates fall, your payments will decrease.
What is the loan-to-value ratio?: The loan-to-value ratio (LTV) is the amount you're borrowing divided by the value of the vehicle. Lenders typically require a down payment that results in an LTV of 80% or less.
Can I pay off my auto loan early?: Yes, most lenders allow prepayment without penalty. Paying off your loan early can save you money on interest, but check your loan agreement for any prepayment penalties.
What documents do I need to apply for an auto loan?: You'll typically need proof of income, a credit report, identification, and information about the vehicle you're purchasing. Some lenders may also require a vehicle history report.