How to Calculate Your Mortgage Payments
- 1
Enter your home price and down payment
Start by entering the purchase price of the home you are considering. Then specify your down payment as a dollar amount or percentage. A higher down payment reduces your loan amount and may help you avoid PMI if you put down 20% or more. - 2
Set your interest rate and loan term
Enter the annual interest rate offered by your lender. Then select a loan term, typically 15 or 30 years. Shorter terms have higher monthly payments but save significantly on total interest paid over the life of the loan. - 3
Review your monthly payment breakdown
The calculator instantly shows your estimated monthly payment split between principal and interest. It also displays total interest paid over the full loan term, total payment amount, and your loan-to-value ratio. - 4
Compare different scenarios
Adjust the inputs to compare different down payment amounts, interest rates, and loan terms side by side. This helps you find the optimal balance between affordable monthly payments and minimizing total interest costs.
Common Use Cases
First-Time Homebuyers
Refinancing Your Current Mortgage
Comparing Loan Offers
Planning Extra Payments
Why use a Mortgage Calculator?
A mortgage calculator is an essential tool for anyone planning to buy a home, refinance an existing loan, or simply explore how different loan terms affect monthly costs. By entering your home price, down payment, interest rate, and loan term, you get an instant breakdown of your monthly principal and interest payment, total interest paid over the life of the loan, and your loan-to-value (LTV) ratio. Understanding these numbers is the first step toward making a confident, well-informed home purchase decision.
Mortgage amortization determines how your payment is split between principal and interest each month. In the early years, most of your payment goes toward interest. As you pay down the balance, a larger share goes to principal. This is why extra principal payments early in the loan term have the biggest impact on reducing total interest. If your down payment is less than 20%, you will likely pay private mortgage insurance (PMI), which adds 0.5% to 1.5% of the loan amount per year until you reach 80% LTV. Use our amortization calculator to see a full payment schedule and our down payment calculator to plan your upfront costs.
Beyond the basic payment, consider how your mortgage fits into your overall financial picture. Compare different scenarios with our home affordability calculator to find a price range that matches your income, or use the refinance calculator if you are evaluating new terms on an existing loan. For a broader view of your debt management, the debt payoff calculator can help you prioritize payments across all your obligations.
How It Compares
Unlike mortgage calculators from banks and lenders, this tool runs entirely in your browser with no data sent to any server. Bank calculators often require you to create an account, submit personal financial details, or sit through a sales pitch before showing results. Our calculator gives you instant, accurate estimates with complete privacy. There is no signup, no email required, and no lender will contact you after using it.
This also means you can freely experiment with different scenarios without worrying about triggering hard credit inquiries or being added to marketing lists. Compare as many combinations of home prices, rates, and terms as you need to make a confident decision on your own timeline.