Free Auto Calculator
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Reviewed by Calculator Editorial Team
This free auto calculator helps you estimate car loan payments, interest rates, and financing costs. Whether you're buying a new or used car, our tool provides quick and accurate calculations to help you make informed financial decisions.
How to Use This Calculator
Using our free auto calculator is simple. Just follow these steps:
- Enter the loan amount you're planning to borrow.
- Select the loan term in years.
- Input the annual interest rate.
- Click "Calculate" to see your estimated monthly payment.
The calculator will display your monthly payment, total interest paid over the loan term, and the total amount repaid. You can also view a breakdown of how your payments are allocated between principal and interest.
Formula Used
The auto loan calculator uses the standard loan payment formula:
Loan Payment Formula
M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]
Where:
- M = Monthly payment
- P = Loan principal (amount)
- i = Monthly interest rate (annual rate divided by 12)
- n = Number of payments (loan term in years multiplied by 12)
This formula calculates the fixed monthly payment required to fully amortize a loan over the specified term.
Worked Example
Let's calculate a loan for $25,000 over 5 years at an annual interest rate of 4%.
- Convert annual rate to monthly: 4% ÷ 12 = 0.333% or 0.00333 in decimal
- Calculate number of payments: 5 years × 12 = 60 payments
- Plug values into formula:
M = $25,000 [ 0.00333(1 + 0.00333)^60 ] / [ (1 + 0.00333)^60 - 1 ]
- Calculate the result: $25,000 × [0.00333 × 1.00333^60] / [1.00333^60 - 1] ≈ $476.50
Your estimated monthly payment would be $476.50, with a total interest of $3,780 and total repayment of $28,780.
Frequently Asked Questions
How accurate is this auto loan calculator?
This calculator provides an estimate based on standard loan formulas. Actual payments may vary slightly due to lender-specific terms and conditions.
Can I use this for both new and used cars?
Yes, this calculator works for any type of auto loan, whether for new or used vehicles.
What if I want to pay extra each month?
Our calculator shows the standard monthly payment. If you pay extra, you'll pay off the loan faster, but you'll pay less in total interest.
Does this include taxes and fees?
No, this calculator only calculates the loan payment. You should factor in additional costs like taxes, registration fees, and insurance when budgeting.