Mortgage Calculator
Mortgage Calculator is a free browser tool that lets you home loan monthly + total interest. Every figure is worked out on your own device using standard formulas — nothing you type is transmitted, which matters when the numbers are your salary, loan or health data. It is used most by anyone tracking a fitness or weight goal week to week. Uses double-precision arithmetic, accurate well beyond everyday needs. Free, unlimited, and free of the upsells most tools of this kind carry.
Key features
- Uses double-precision arithmetic, accurate well beyond everyday needs.
- Figures are indicative — they are not financial, medical or legal advice.
- Works on desktop, tablet and phone — no separate app to install.
- Loads in under a second and gives its result in one action.
How to use Mortgage Calculator
- Enter your figures: Fill in the fields above. Leave anything optional blank and a sensible default is used.
- Pick your units: Switch between metric and imperial if the calculation involves units.
- Read the result: The answer updates immediately, with the breakdown shown so you can check the working.
Frequently asked questions
- Does it support metric and imperial? — Yes, where the calculation involves units you can switch between them and the result converts with you.
- Can I rely on this for a formal decision? — Treat Mortgage Calculator as a quick indication. For anything binding — a mortgage, a tax return, a medical decision — confirm with a qualified professional.
- Are my numbers sent anywhere? — No. The calculation runs in your browser. Salary, loan and health figures never leave the device.
- How accurate is Mortgage Calculator? — Mortgage Calculator uses the standard published formula for this calculation with full double-precision arithmetic, so the arithmetic itself is exact. Accuracy of the answer depends on the figures you enter.