Nerdwallet Auto Loan Calculator
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Reviewed by Calculator Editorial Team
This NerdWallet Auto Loan Calculator helps you estimate monthly payments, total interest costs, and loan affordability for auto financing. 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:
- Enter the loan amount (the total price of the vehicle you're financing)
- Input the interest rate (APR) offered by the lender
- Select the loan term in years (typically 3-7 years)
- Click Calculate to see your estimated monthly payment and total interest
The calculator uses the standard auto loan payment formula to provide accurate estimates. Remember that actual payments may vary based on lender fees and other factors.
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
- r = Monthly interest rate (APR ÷ 12 ÷ 100)
- n = Number of payments (Loan term in years × 12)
Total interest is calculated by subtracting the principal from the total amount paid over the life of the loan.
Worked Example
Let's calculate a loan for $25,000 at 4.5% APR over 5 years:
- Convert APR to monthly rate: 4.5% ÷ 12 = 0.375% or 0.00375
- Calculate number of payments: 5 × 12 = 60
- Plug into formula: $25,000 × (0.00375(1+0.00375)^60) / ((1+0.00375)^60 - 1)
- Result: $478.24 per month
- Total paid: $478.24 × 60 = $28,694.40
- Total interest: $28,694.40 - $25,000 = $3,694.40
This example shows that over 5 years, you would pay $478.24 per month with $3,694.40 in total interest.
Loan Term Comparison
Compare how different loan terms affect your monthly payments and total interest costs:
| Loan Term | Monthly Payment | Total Interest |
|---|---|---|
| 3 years | $625.38 | $5,134.40 |
| 4 years | $521.85 | $3,741.60 |
| 5 years | $478.24 | $3,694.40 |
| 6 years | $445.96 | $3,659.64 |
| 7 years | $420.79 | $3,641.46 |
This table shows that while longer terms reduce monthly payments, they also increase total interest costs. Shorter terms may be better if you can afford higher payments.
Frequently Asked Questions
- What is the difference between APR and interest rate?
- APR (Annual Percentage Rate) includes all fees and costs associated with the loan, while the interest rate is the actual cost of borrowing. APR is typically higher than the interest rate.
- How accurate is this calculator?
- This calculator provides estimates based on standard loan formulas. Actual payments may vary due to lender fees, taxes, and other factors not included in the calculation.
- What factors affect auto loan payments?
- Key factors include loan amount, interest rate, loan term, down payment, and any additional fees or taxes. Trade-in value and credit score can also impact your financing options.
- Is it better to get a longer or shorter loan term?
- Longer terms reduce monthly payments but increase total interest costs. Shorter terms have higher payments but lower total interest. Choose based on your budget and financial goals.
- How can I lower my auto loan payments?
- Consider making a larger down payment, negotiating a lower interest rate, or choosing a longer loan term. Also check for lender discounts or special financing offers.