What BMI ranges are used?

Under 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30+ obese.

Does this work with imperial units?

Yes, switch to the Imperial tab to enter feet, inches, and pounds.

Is BMI a perfect health measure?

No, it doesn't account for muscle mass or body composition, but it's a useful general indicator.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

BMI Calculator

Calculate your Body Mass Index and healthy weight range.

Support

Works Offline

Privacy First

No Login

No API

BMI Calculator

Choose units and enter your measurements

Height (cm)

Weight (kg)

Result

Updates live as you type

BMI

22.9

About the BMI Calculator

Enter your height and weight in metric or imperial units to calculate your Body Mass Index (BMI), see which category it falls into, and get a healthy weight range for your height.

Examples

175cm, 70kg

height=175cm, weight=70kg

Output

YAMLBMI: 22.9, Normal weight

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser