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Mortgage Calculator

Loan details

Enter your loan amount, rate and term.

Free Mortgage Calculator — Know Your Real Monthly Payment

Buying a home is one of the biggest financial decisions most people make, and the monthly payment is the number that matters most. This free mortgage calculator turns your loan amount, interest rate and term into a clear monthly payment, then shows you exactly how much of it goes to interest over the life of the loan.

Unlike a rough rule of thumb, it uses the standard amortization formula, so the result matches what a lender would quote for principal and interest. Add an optional extra monthly payment and you will instantly see how many months it shaves off the loan and how much interest it saves.

How to use it

Enter the loan amount, the annual interest rate and the term in years. Optionally add an extra payment, then tap Calculate. The tool shows your monthly payment, total interest, total paid and a year-by-year table showing the remaining balance at the end of each year.

Frequently asked questions

Is the result exact?
The principal-and-interest payment is mathematically exact for a fixed-rate loan. Your real payment may be higher once taxes, insurance and other escrow items are added.
Does a longer term really cost more?
Yes. A longer term lowers the monthly payment but greatly increases total interest because the balance stays higher for longer.
What counts as an extra payment?
Any amount you pay above the scheduled monthly payment. It reduces principal directly, shortening the loan.

All calculations happen in your browser. Nothing you enter is stored or sent to a server.

About Mortgage Calculator

Free mortgage calculator that shows your monthly payment, total interest and a year-by-year amortization schedule. Add an extra payment to see how much faster you pay it off.

FAQ

What is Mortgage Calculator?
Free mortgage calculator that shows your monthly payment, total interest and a year-by-year amortization schedule. Add an extra payment to see how much faster you pay it off.
Is Mortgage Calculator free to use?
Yes, it is completely free — no sign-up or payment needed.
Do I need to install or sign up?
No. It runs entirely in your browser — nothing to download and no account required.
How do I use Mortgage Calculator?
Open the tool, follow the on-screen steps, and your result is ready in seconds — you can copy or download it right away.
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