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Auto Loan Calculator with APR

Reviewed by Calculator Editorial Team

This auto loan calculator with APR helps you determine your monthly payments, total interest paid, and loan affordability. Simply enter your loan amount, interest rate, and loan term to get instant results.

How to Use This Calculator

Using this auto loan calculator is simple. Follow these steps:

  1. Enter the loan amount you're considering in the "Loan Amount" field.
  2. Input the Annual Percentage Rate (APR) for the loan in the "APR" field.
  3. Specify the loan term in years in the "Loan Term" field.
  4. Click the "Calculate" button to see your results.
  5. Review the monthly payment, total interest, and total cost of the loan.
  6. Use the chart to visualize the amortization schedule.

The calculator will display your monthly payment, total interest paid over the life of the loan, and the total cost of the loan including principal and interest.

Formula Used

The auto loan calculator uses the standard loan payment formula:

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

Where:

  • P = Principal loan amount
  • r = Monthly interest rate (APR/12/100)
  • n = Number of payments (Loan Term × 12)

Total Interest = (Monthly Payment × n) - P

Total Cost = P + Total Interest

Worked Example

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

  1. Monthly interest rate = 4.5%/12 = 0.00375
  2. Number of payments = 5 × 12 = 60
  3. Monthly payment = $25,000 × (0.00375(1 + 0.00375)^60) / ((1 + 0.00375)^60 - 1) ≈ $454.23
  4. Total interest = ($454.23 × 60) - $25,000 ≈ $4,453.80
  5. Total cost = $25,000 + $4,453.80 ≈ $29,453.80

This example shows that a $25,000 loan at 4.5% APR over 5 years would have monthly payments of approximately $454.23, totaling about $29,453.80 over the life of the loan.

Interpreting Results

When using this auto loan calculator, consider these key points:

  • The monthly payment includes both principal and interest.
  • Total interest is the difference between the total cost and the original loan amount.
  • Shorter loan terms typically result in higher monthly payments but lower total interest.
  • Lower interest rates generally mean lower monthly payments and lower total interest.

Use the amortization chart to see how much of each payment goes toward principal versus interest over time.

Frequently Asked Questions

What is APR in an auto loan?
APR stands for Annual Percentage Rate. It represents the annual cost of borrowing, including both the interest rate and any fees, expressed as a percentage. APR gives you a more accurate picture of the true cost of your loan compared to the stated interest rate.
How does APR affect my monthly payments?
A higher APR means you'll pay more in interest over the life of the loan, which increases your monthly payments. Conversely, a lower APR reduces both the total interest paid and your monthly payments. Always compare APRs when shopping for auto loans.
Can I use this calculator for refinancing?
Yes, this calculator works for both new auto loans and refinancing. Simply enter your current loan amount, the new APR you're considering, and the remaining loan term to see how refinancing would affect your payments.
What's the difference between APR and interest rate?
The interest rate is the cost of borrowing before fees, while APR includes all fees and charges. APR is always equal to or higher than the interest rate. Lenders must disclose both rates to help you compare loan offers accurately.