About Calculator Converter Tool

Who We Are

Calculator Converter Tool builds free, private health and fitness calculators. Our library covers BMI, body fat, BMR and TDEE, calorie and protein needs, step and walking calories, sleep timing, heart-rate zones, height conversion and gym strength converters. Every tool runs in your browser, so the numbers you enter never leave your device.

We believe a calculator should answer your question quickly and honestly — without an account, without a newsletter wall, and without making you hunt for the result.

How We Write and Review Content

Each page is written for people first, in plain language, and shows the actual formula and a worked example so you can see how the answer is produced. Our editorial team checks both the maths and the explanation, tests each calculator against known values, and re-reviews pages as guidance evolves.

We cite one trusted external reference per calculator page — typically a national health body or professional organisation — and nothing more, so you always know where to look next.

Our Approach to Privacy

You should not have to hand over personal information to multiply two numbers. All calculations happen locally in your browser. We do not require an account, and we do not store the values you enter to use a calculator. You can read the details on our Privacy Policy page.

Important Medical Disclaimer

These calculators are educational and planning tools, not medical devices. They provide estimates based on standard formulas and do not diagnose, treat or cure any condition. Decisions about your health, diet, exercise or medication should be made with a qualified doctor, dietitian or other healthcare professional.

Contact Us

Found a bug, have a question, or want to suggest a calculator? We read every message. Please contact the editorial team through the site, and include the calculator name and the values you entered so we can reproduce the issue quickly.