Mortgage Calculator

Calculate your monthly mortgage payments, including principal, interest, taxes, and insurance (PITI). See the total cost of your mortgage over time.

$
$
%
$/year
$/year

Mortgage Calculator: Plan Your Home Loan Payments

Introduction

Buying a home is one of the biggest financial decisions most people will make. Understanding your mortgage payments is crucial to making informed choices about financing your home. A mortgage calculator helps you determine how much you'll need to pay each month based on factors like loan amount, interest rate, and loan term.

How Does a Mortgage Calculator Work?

A mortgage calculator is a tool that estimates your monthly mortgage payments based on key financial factors:

1. Loan Amount (Principal)

This is the total amount you are borrowing from the lender to purchase the property.

2. Annual Interest Rate

This is the percentage charged by the lender for borrowing money. The interest rate is typically quoted as an annual percentage.

3. Loan Term

The number of years you plan to take to repay the loan. Common mortgage terms include 15, 20, and 30 years.

The Mortgage Formula

M = P × [r(1 + r)^n] / [(1 + r)^n - 1]

Where:

  • M = Monthly payment
  • P = Principal loan amount
  • r = Monthly interest rate (annual rate divided by 12)
  • n = Total number of payments (years × 12)

Key Mortgage Questions and Scenarios

1. How Much Should I Borrow?

A good rule of thumb is to ensure your monthly mortgage payment does not exceed 28–30% of your gross monthly income. Use our Debt-to-Income Calculator to determine your optimal borrowing amount.

2. What Happens If Interest Rates Change?

If you have a fixed-rate mortgage, your payment remains the same. With an adjustable-rate mortgage (ARM), your payment can increase or decrease based on market rates. Try our ARM Calculator to see how rate changes affect your payments.

3. Should I Choose a 15-Year or 30-Year Loan?

A 15-year loan has higher monthly payments but lower total interest paid. A 30-year loan has lower monthly payments but higher total interest paid. Compare different scenarios with our Loan Comparison Calculator.

Additional Mortgage Costs to Consider

  • Property taxes
  • Home insurance
  • Private Mortgage Insurance (PMI)
  • Maintenance and repairs
  • HOA fees (if applicable)

Use our Total Cost of Homeownership Calculator to get a complete picture of all expenses.

Conclusion

Understanding your mortgage calculations is essential for making informed decisions about home financing. Use our calculator to explore different scenarios and find the best mortgage option for your situation. Remember to consider all aspects of homeownership and use our suite of financial calculators to make the best decision for your future.

Explore More Financial Tools

Visit our Financial Calculators section to access our complete suite of tools for mortgages, loans, investments, and more.

© 2025 Calculator Hub. All rights reserved.