GenRiseGenRise
All tools
Calculators

BMI Calculator

Calculate Body Mass Index from height and weight.

Share:

BMI: 24.2

Normal weight

Healthy weight range at 170 cm (BMI 18.5–24.9): 53.5–72.0 kg

Next step

Keep going with what you just made.

See it in action

70 kg / 1.75 m → 22.9 (normal)

70 kg / 1.75 m → BMI 22.9 (normal)

Sample output — your files never leave your device.

Frequently asked questions

How is BMI calculated?

Weight in kilograms divided by height in metres squared (kg/m²). If you enter feet/inches and pounds, the tool converts to metric first — same formula, same result.

What do the BMI categories mean?

WHO ranges: under 18.5 is underweight, 18.5–24.9 normal weight, 25–29.9 overweight, 30 and above obese. These are population-level screening bands, not a personal diagnosis.

Is BMI accurate for everyone?

BMI doesn't distinguish muscle from fat or account for frame size — muscular people can read "overweight" while being lean. Use it as a screening number, and consult a professional for a real assessment.

Is my height and weight data stored?

No — the calculation happens entirely in your browser. Nothing is sent or saved, which is how a health-adjacent tool should behave.

Is BMI Calculator free to use?

Yes. BMI Calculator is completely free on GenRise, with no limits, watermarks, or hidden paywalls.

Do I need to create an account or sign up?

No. Every GenRise tool works instantly in your browser — no account, email, or sign-up required.

Is my file uploaded to a server?

No. BMI Calculator runs entirely on-device using your browser, so your files are never uploaded or stored anywhere. All processing happens locally.

How does BMI Calculator work?

BMI Calculator uses your browser's built-in capabilities — Canvas, WebAssembly, and File APIs — to process files locally. Calculate Body Mass Index from height and weight. Simply open the tool, select your file, and the result is generated instantly on your device.

Is BMI Calculator safe and private?

Yes. Since BMI Calculator processes everything in your browser, your files never leave your device. There is no server-side storage, no tracking of file contents, and no data collection.

Can I use BMI Calculator on mobile?

Yes. BMI Calculator works on any modern browser, including mobile devices. It is fully responsive and optimized for both desktop and mobile use.

About BMI Calculator

GenRise BMI Calculator computes your Body Mass Index from height and weight — in metric (cm, kg) or imperial (ft/in, lb) units, whichever you know — and shows the WHO category: underweight, normal weight, overweight or obese. The conversion between unit systems is handled internally, so there's no need to convert anything first. The number is computed on your device — health data is exactly the kind of thing that shouldn't be logged by a server.

Key features

  • Metric (cm/kg) and imperial (ft/in/lb) input
  • Instant BMI with one decimal precision
  • WHO weight category shown alongside the number
  • No unit conversion needed — mixed input handled
  • Runs locally — your health data stays private
  • Free, no account, works on any device

How to use BMI Calculator

  1. 1Open the tool — no sign-up or installation needed. BMI Calculator works directly in your browser.
  2. 2Add your input — a file, text, or settings. Everything is processed in your browser; nothing is uploaded to a server.
  3. 3Adjust any options if needed. Calculate Body Mass Index from height and weight.
  4. 4Copy or download your result instantly. It is generated locally on your device.

Common use cases

  • Checking your BMI for a health screening or form
  • Tracking BMI alongside a fitness or weight goal
  • Quick check when a study or program asks for BMI
  • Converting between measurement systems seamlessly
  • A private way to compute BMI without apps that log it

100% Private — No uploads, ever

BMI Calculator runs entirely in your browser. Anything you enter or upload is processed locally and never sent to a server. There is no account required, no tracking of your content, and no data collection.

Related Calculators tools