Rocket Money Mortgage Calculator

How to Use This Calculator

To use the Rocket Money Mortgage Calculator:

1. Enter the loan amount you're applying for in the "Loan Amount" field.
2. Input your annual interest rate 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 will display your estimated monthly payment, total interest paid over the life of the loan, and a breakdown of your loan amortization schedule.

Formula Used

The calculator uses the standard mortgage payment formula:

This formula calculates the fixed monthly payment required to fully amortize a loan over the specified term.

Worked Example

Let's calculate a mortgage payment for a $200,000 loan at 4.5% annual interest for 30 years.

1. Convert the annual interest rate to a monthly rate: 4.5% ÷ 12 = 0.375% or 0.00375 in decimal form.
2. Calculate the number of payments: 30 years × 12 = 360 payments.
3. Plug the values into the formula:

   Monthly Payment = $200,000 × (0.00375(1 + 0.00375)^360) / ((1 + 0.00375)^360 - 1)

4. The calculation yields a monthly payment of approximately $1,073.64.

This example shows that with a $200,000 loan at 4.5% interest over 30 years, your monthly payment would be about $1,073.64.