Google Auto Loan Calculator

Our Google Auto Loan Calculator helps you estimate your monthly payments, total interest, and loan cost for an auto loan. Simply enter your loan amount, interest rate, and loan term to get an accurate calculation.

How the Auto Loan Calculator Works

An auto loan calculator estimates your monthly payments based on the loan amount, interest rate, and loan term. The calculation uses the standard loan amortization formula to determine the fixed monthly payment required to pay off the loan over the specified term.

The calculator provides key metrics including:

Monthly payment amount
Total interest paid over the loan term
Total cost of the loan (principal + interest)

This information helps you understand the financial commitment of an auto loan before applying for financing.

Formula Used

Auto Loan Payment Formula

The monthly payment (PMT) for an auto loan is calculated using the formula:

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

Where:

P = Principal loan amount
r = Monthly interest rate (annual rate divided by 12)
n = Number of payments (loan term in months)

This formula accounts for the interest on the loan balance over each payment period, resulting in a fixed monthly payment that pays off the loan over the specified term.

Worked Example

Let's calculate the monthly payment for a $25,000 auto loan with a 4.5% annual interest rate over 5 years (60 months).

Example Calculation

Principal (P) = $25,000

Annual interest rate = 4.5%

Monthly interest rate (r) = 4.5% ÷ 12 = 0.375% or 0.00375

Loan term in months (n) = 5 years × 12 = 60 months

Using the formula:

PMT = $25,000 × (0.00375(1 + 0.00375)^60) / ((1 + 0.00375)^60 - 1)

PMT ≈ $25,000 × (0.00375 × 1.246) / (1.246 - 1)

PMT ≈ $25,000 × 0.00469 / 0.246

PMT ≈ $25,000 × 0.01906 ≈ $476.50

The monthly payment for this example is approximately $476.50. The total interest paid over 5 years would be about $1,800, and the total cost of the loan would be $26,800.

Frequently Asked Questions

What is the difference between APR and interest rate?

APR (Annual Percentage Rate) is the cost of credit expressed as a yearly rate, while the interest rate is the actual percentage charged on the loan balance. APR includes additional fees and costs, making it a more comprehensive measure of the true cost of borrowing.

How does loan term affect my monthly payment?

A longer loan term results in lower monthly payments but higher total interest paid over the life of the loan. A shorter loan term means higher monthly payments but lower total interest. The optimal term depends on your financial situation and ability to make regular payments.

What is the difference between fixed and variable interest rates?

A fixed interest rate remains the same throughout the loan term, providing predictable monthly payments. A variable interest rate fluctuates with market conditions, which can result in lower initial payments but may increase if interest rates rise. Fixed rates are generally more stable, while variable rates offer potential savings if rates decrease.