Mortgage Calculator

Calculate your monthly mortgage payment — principal, interest, taxes, insurance and PMI — with an amortization schedule.

100% Browser-Based • Local Processing
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An estimate of a fixed-rate mortgage, not a quote or an offer of credit. Closing costs, points, escrow shortfalls and any rate change are not included, and property tax and insurance both rise over time. Talk to a lender or a qualified adviser before committing.

Total monthly payment

2,215.62

Principal & interest 1,769.79
Tax, insurance, HOA 445.83
Loan amount 280,000.00
Interest over the term 357,124.57
Formula and working

The formula

P&I = L × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1), then add tax, insurance and HOA

Your numbers

Waiting for your numbers.

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Privacy Focused

🔒 Local Processing. Your numbers never leave your device.

Instant Results

🌐 Fully Client-Side. Runs instantly in your browser.

No Signup

⚡ No accounts. No API keys. Just open and use.

Browser Based

🚀 No installs, no sign-ups, no server round-trip.

Overview

What is a Mortgage Calculator?

A Mortgage Calculator estimates the monthly payment on a home loan. From the home price, down payment, interest rate, and term it computes the principal-and-interest payment, and with optional property tax, insurance, and PMI it gives your full monthly cost (PITI) plus total interest and an amortization schedule. It runs privately in your browser.

A mortgage payment is more than principal and interest — it usually also includes property tax, homeowners insurance, and, if your down payment is under 20%, private mortgage insurance (PMI). Knowing the full 'PITI' monthly cost is what tells you whether a home is affordable.

This calculator builds up that complete figure and shows the repayment schedule, all in your browser, so your financial details stay private.

Guide

How to calculate a mortgage payment

Step 1: Enter the home price, down payment, interest rate, and loan term

Enter the home price, down payment, interest rate, and loan term.

Step 2: Add property tax, home insurance, PMI, and HOA if you want the full monthly cost

Add property tax, home insurance, PMI, and HOA if you want the full monthly cost.

Step 3: Read the principal & interest, the total monthly payment (PITI), and the amortization schedule

Read the principal & interest, the total monthly payment (PITI), and the amortization schedule.

Screens

Mortgage Calculator in action

Mortgage Calculator showing the full monthly payment in the browser.
PITI breakdown
Mortgage amortization schedule with principal and interest.
Amortization
Calculating a mortgage on a phone, no app installed.
Mobile (stacked)
Details

Principal, interest, taxes, insurance — the full PITI

The core of a mortgage payment is principal and interest, calculated with the same amortized formula as any loan: M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1], where P is the loan amount (home price minus down payment), r is the monthly rate, and n is the number of payments. But lenders usually collect more each month into an escrow account, so the real payment is 'PITI': Principal, Interest, Taxes (property tax ÷ 12), and Insurance (homeowners insurance ÷ 12), plus PMI if applicable and any HOA dues. PMI is typically required when your down payment is under 20% of the price and is dropped once you cross that equity threshold — so increasing the down payment can both lower the loan and remove PMI. The amortization schedule shows how decades of payments shift from interest-heavy to principal-heavy. Honest caveat: this is a close estimate; actual rates depend on your credit and market, escrow amounts change as taxes and premiums change, and closing costs aren't included — it's not financial advice. Everything computes locally in your browser. For non-home loans use the Loan Calculator; to compare saving vs buying inputs, the Compound Interest Calculator.

Support

Frequently Asked Questions

What does a mortgage calculator include?

At minimum it calculates the principal-and-interest payment from the loan amount, rate, and term. A full one also adds property tax, homeowners insurance, PMI, and HOA dues to give your total monthly payment — known as PITI (Principal, Interest, Taxes, Insurance), which is what you actually pay each month.

What is PITI?

PITI stands for Principal, Interest, Taxes, and Insurance — the four parts of a typical monthly mortgage payment. Lenders often collect taxes and insurance in an escrow account alongside the loan payment, so PITI reflects your true monthly housing cost, not just the loan repayment portion.

What is PMI and when do I pay it?

Private mortgage insurance (PMI) protects the lender and is usually required when your down payment is less than 20% of the home price. It's added to your monthly payment and is typically removed once you've built 20% equity. Putting down 20% or more generally avoids PMI entirely, which the calculator reflects.

How does the down payment affect the payment?

A larger down payment reduces the loan amount, which lowers both the monthly principal-and-interest and the total interest over the life of the loan. Reaching 20% down also removes PMI. The calculator lets you enter the down payment as an amount or a percentage to compare scenarios.

Why is most of my early mortgage payment interest?

Because interest is charged on the outstanding balance, which is highest at the start of a long mortgage. With a fixed payment, the early years are mostly interest and only slowly chip at the principal; the balance — and so the interest portion — falls over time. The amortization schedule shows this clearly.

Is this mortgage estimate exact?

It's a close estimate, not a quote. Your actual rate depends on credit and the market, escrow amounts shift as taxes and insurance premiums change, and it doesn't include closing costs or fees. Use it to gauge affordability and compare options, and get exact figures from a lender. It isn't financial advice.

Is it free, and do I need to sign up?

Yes, it's completely free with no account, no trial, and no limit on how many times you use it. It runs entirely in your browser, so there's no sign-in wall — just open the page and calculate.

Is my data private?

Yes. Everything is calculated in your browser — the numbers you enter are never sent to a server, and nothing is stored once you close the tab. That keeps any personal figures (salary, loan, health) on your own device.

Does it work on mobile?

Yes. It runs in your phone's browser with nothing to install, so you can calculate on Android or iOS. The layout adapts to small screens, so entering numbers and reading the result is easy on the go.

Does it work offline?

Once the page has loaded, the calculation runs entirely on your device, so it keeps working without a connection. You only need to be online to open the page the first time — which is also why nothing you enter is uploaded.

Can I copy or share the result?

Yes. You can copy the result to your clipboard with one click, and many results can be shared. Because everything is calculated locally, copying is instant with no upload step.

How accurate is it, and is this professional advice?

The math is accurate for the inputs you give, and the formula is shown so you can verify it. But results are estimates for general use, not professional advice — finance calculators use simplified assumptions and ignore fees and rate changes, and health calculators are general estimates, not medical advice. For important decisions, consult a qualified professional.

Still have questions?

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