BMI Calculator
BMI is computed as weight (kg) ÷ height (m)². This tool accepts metric (cm + kg) or imperial (ft + in + lb) inputs and reports the WHO category (underweight, normal, overweight, obese class I/II/III). Runs locally in your browser — your data is never sent anywhere.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Calculator
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Frequently asked
Is BMI Calculator free to use?
Yes. BMI Calculator is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — BMI Calculator runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does BMI Calculator work?
Open BMI Calculator, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does BMI Calculator support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. BMI Calculator uses standard web APIs and does not require any plugin, extension, or sign-up.