Mortgage Calculator
Estimate your monthly mortgage payment — principal, interest, taxes, insurance and PMI — and see exactly how the loan is paid off over time. Interactive charts and a full amortization schedule update as you type, and you can download every month as a CSV or a one-page PDF. Everything runs in your browser, so your numbers never leave your device.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to calculate your mortgage
- 1
Enter your loan
Set the home price, down payment, loan term and interest rate. The monthly payment and totals update the instant you type — nothing is uploaded.
- 2
Add taxes, insurance & PMI
Optionally include yearly property tax and home insurance, monthly HOA dues and a PMI rate. They’re folded into your monthly payment, and PMI drops off automatically once you reach 22% equity.
- 3
See the breakdown & charts
Watch the payment breakdown, principal-vs-interest charts and full amortization schedule update live. Add an extra monthly payment to see how much interest you’d save.
- 4
Download your projections
Save the complete month-by-month schedule as a CSV for Excel or Google Sheets, or a clean one-page PDF summary with the chart and a yearly breakdown — both generated on your device.
Why use Mortgage Calculator?
100% private
Your home price, income and loan numbers never leave your browser. No account, no upload, no server.
Full payment breakdown
See principal and interest, property tax, home insurance, HOA and PMI combined into your real monthly payment.
Complete amortization schedule
Every single month — principal, interest and remaining balance — with charts, viewable by year or month and downloadable.
Pay off faster
Add an extra monthly payment and instantly see how many years you cut off the loan and how much interest you save.
How your monthly mortgage payment is calculated
Your core payment covers principal and interest, spread evenly over the life of the loan so the amount stays the same each month. Early payments are mostly interest; as the balance falls, more of each payment goes to principal. On top of that, lenders usually collect property tax, home insurance and — if your down payment is under 20% — PMI, plus any HOA dues. This calculator adds them all together so you see the real number you’d pay each month, not just principal and interest.
What PMI is and when it goes away
Private mortgage insurance protects the lender when you put down less than 20%. It’s an extra monthly cost, but it isn’t forever: once you’ve built 22% equity (your balance falls to 78% of the home’s value), PMI automatically drops off. Enter your PMI rate and the calculator shows the added cost and the month it ends — so you can see the lower payment to look forward to, or how a bigger down payment avoids PMI entirely.
Reading the amortization schedule
Amortization is how a fixed payment clears the loan: each month’s payment covers the interest on the current balance first, and the remainder reduces the principal. Because the balance is highest at the start, early payments are mostly interest; over the years the split tips toward principal. The schedule lays this out month by month — payment, principal, interest and remaining balance — with a yearly view for the big picture, and you can download the whole thing as a CSV.
Pay it off faster with extra payments
Every extra dollar you put toward principal means less interest charged on the balance for every month that follows, so the savings compound. On a typical 30-year loan, an extra hundred or two a month can shave years off the term and save tens of thousands in interest. Enter an extra monthly amount and the calculator shows the new payoff date, the months saved and the total interest you avoid.
Guides & explanations
Why starting ten years earlier beats contributing twice as much, what monthly compounding actually does, and how to sanity-check any projection — including ours.
Read the guide →Why the first years are almost all interest, how every extra dollar compounds the savings, and exactly what the amortization schedule is showing you. Numbers you can use with any calculator.
Read the guide →Frequently asked questions
Do my numbers get uploaded anywhere?
No. Every calculation runs entirely in your browser — your income, loan amount, balances and goals never leave your device. There’s no account and nothing is sent to a server.
Does this include taxes, insurance and PMI?
Yes. Add your yearly property tax and home insurance, monthly HOA dues and a PMI rate, and they’re folded into your monthly payment. PMI automatically drops off once you reach 22% equity (78% loan-to-value).
What is an amortization schedule?
It’s a month-by-month table showing how each payment splits between interest and principal, and the balance that remains. Early on, most of your payment is interest; over time, more goes to principal.
How do extra payments save money?
Every extra dollar goes straight to principal, so you’re charged less interest on the remaining balance for the rest of the loan. Even a small amount each month can cut years off the term and save thousands in interest — the calculator shows exactly how much.
Can I download the month-by-month numbers?
Yes. You get the full schedule as a CSV you can open in Excel or Google Sheets, plus a one-page PDF summary with the chart and a yearly breakdown — both generated on your device.
Are these results financial advice?
No. These are estimates to help you explore scenarios. Real loan and investment outcomes depend on terms, fees, taxes and market returns that vary — always confirm with your lender or a qualified advisor.