Mortgage Calculator

Estimate your full monthly mortgage payment — principal and interest plus property tax, home insurance, PMI and HOA fees. Enter the home price, down payment, rate and term, add extra payments to see how much interest and time you save, and review the yearly amortization schedule.

This tool runs entirely in your browser.

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How to use the Mortgage Calculator

1Enter the home price and your down payment (as a percentage or an amount).
2Set the interest rate and loan term.
3Add property tax, insurance, PMI and HOA costs — or leave the defaults as estimates.
4Optionally add an extra monthly principal payment, then read the monthly total and amortization table.

What is the Mortgage Calculator?

The principal-and-interest part uses the standard formula M = P × r ÷ (1 − (1 + r)^−n), with the monthly rate r and n monthly payments. Property tax, insurance and HOA fees are added on top, because lenders usually collect them in the same monthly payment.

With less than 20 % down, most conventional US loans add private mortgage insurance (PMI). The calculator charges PMI until the balance reaches 80 % of the home price and shows how many months that takes. Extra principal payments shorten the loan and cut total interest.

Frequently asked questions

How much of my payment is interest?

Early on, most of it. In a 30-year loan at 6.5 %, about 85 % of the first payment is interest; the share falls every month as the balance shrinks. The amortization table shows the split year by year.

Are the tax and insurance figures exact?

No — they are estimates you can change. Use your county’s property tax rate and a real insurance quote for an accurate figure.

Is the Mortgage Calculator free and private?

Yes. The Mortgage Calculator is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.

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