BMI Calculator
Calculate your Body Mass Index from weight and height. Get your health category instantly.
Documentation
BMI measures body fat using weight and height. Formula: weight (kg) / height (m)². It classifies health status.
Underweight: below 18.5 | Normal: 18.5–24.9 | Overweight: 25–29.9 | Obese: 30+
- 1) Enter your weight (kg or lbs).
- 2) Enter your height (cm or ft/in).
- 3) View your BMI and health category.
FAQs
BMI measures body fat using weight and height. It classifies whether a person is underweight, normal, overweight, or obese.
Underweight (below 18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+).
BMI is general. It may not be accurate for athletes, elderly, pregnant women, or very muscular individuals.
No. All calculations happen locally in your browser. Your data is never uploaded or stored.
Yes. Completely free with no signup or limits.
Last updated: 2026-08-04
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