About
Tools that keep
their word.
We built bmi-calculator.tools because health tools should be accessible to everyone — no sign-up, no paywall, no data collection. Your height and weight never leave your device.
Why we built this
Many health calculators require an account just to see results, or sell your health data to advertisers. We think that's wrong. We display ads to cover costs, and your health information stays private.
Our promises
Never
Your data sent to our servers
All calculations happen in your browser. We never see your height, weight, or BMI.
Never
Account required
Open the tool, use it, leave. No email, no password.
Never
Health data sold
We don't know your BMI and we don't sell what we don't know.
Never
Results hidden behind paywall
Full results, always free. No upgrade needed.
The Truly Free Seal
Every tool carrying this seal meets the same standard: no account, no paywall, no catch. We are building a network of tools that keep their word.
Medical disclaimer
BMI is a screening tool, not a diagnostic measure. Results are for informational purposes only. Always consult a qualified healthcare professional for medical advice.