Mortgage Calculator
Monthly payment, total interest and principal split.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Need Mortgage fast? Anyone planning their personal finances use the Mortgage Calculator to skip the spreadsheet and get a reliable answer in one step. It's 100% free, runs privately in your browser, and the result is ready to drop into a pitch, plan or report.
About Mortgage Calculator
Need to work out Mortgage fast? This calculates your monthly mortgage payment along with total interest and the principal/interest split. The Mortgage Calculator uses the standard formula — M = P × r(1 + r)^n ÷ ((1 + r)^n − 1), where r is the monthly rate and n the number of payments — and updates the moment you type. For example, $300,000 at 6% over 30 years is about $1,799 a month. It's 100% free, private (your numbers never leave your device) and works on any device.
How to use Mortgage Calculator
- 1Enter the loan amount, interest rate and term into the calculator.
- 2The Mortgage is computed automatically using the formula M = P × r(1 + r)^n ÷ ((1 + r)^n − 1), where r is the monthly rate and n the number of payments — there's no button to press.
- 3Change any input to model a different scenario, then note or copy the result.
Why use Mortgage Calculator?
- ✓Calculates Mortgage instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the numbers you enter stay private
- ✓Updates live as you type — perfect for comparing scenarios
Frequently asked questions
How do you calculate Mortgage?+
This calculates your monthly mortgage payment along with total interest and the principal/interest split. The formula is: M = P × r(1 + r)^n ÷ ((1 + r)^n − 1), where r is the monthly rate and n the number of payments. For example, $300,000 at 6% over 30 years is about $1,799 a month.
What's included in a mortgage payment?+
This tool covers principal and interest; your real payment may also include property taxes, homeowners insurance and PMI (together 'PITI').
Is the Mortgage Calculator free to use?+
Yes — it's completely free, with no sign-up, no login and no usage limits. You can run it as many times as you like.
Is my data private?+
Yes. The Mortgage Calculator runs entirely in your browser, so the figures you enter are never uploaded or stored on any server.
Embed Mortgage Calculator on your website
Want Mortgage Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/mortgage-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Mortgage Calculator — ToolJolt" loading="lazy"></iframe>