Penfed Auto Loan Calculator App

How to Use This Calculator

Follow these simple steps to calculate your PenFed auto loan payments:

1. Enter the loan amount you're requesting in the "Loan Amount" field.
2. Input your interest rate percentage in the "Interest Rate" field.
3. Select the loan term in years from the dropdown menu.
4. Click the "Calculate" button to see your estimated monthly payment and other details.
5. Use the "Reset" button to clear all fields and start over.

The calculator uses the standard auto loan payment formula to provide accurate estimates. For more precise results, consult with a PenFed loan officer.

Formula Used

The calculator uses the following formula to calculate your monthly payment:

This formula accounts for the interest on the unpaid balance of your loan for each payment period.

Worked Example

Let's calculate a $25,000 loan at 4.5% annual interest for 5 years:

1. Principal (P) = $25,000
2. Annual interest rate = 4.5% or 0.045
3. Monthly interest rate (i) = 0.045 / 12 ≈ 0.00375
4. Number of payments (n) = 5 years × 12 = 60 months
5. Plugging into the formula:
   M = 25000 [ 0.00375(1 + 0.00375)^60 ] / [ (1 + 0.00375)^60 - 1 ] ≈ $478.42
6. Total payments = $478.42 × 60 ≈ $28,705.20
7. Total interest = $28,705.20 - $25,000 = $3,705.20

This example shows you would pay approximately $478.42 per month with a total interest cost of $3,705.20.