BMI Calculator
Calculate your body mass index (BMI), weight category and healthy weight range from height and weight, using WHO categories.
BMI
-
-Ideal weight
-Healthy weight range
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BMI formula
BMI = weight (kg) ÷ height (m)². For example, 65 kg at 170 cm gives 65 ÷ (1.7 × 1.7) = 22.5.
WHO BMI categories (adults)
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25 – 29.9 | Overweight |
| 30 – 34.9 | Obesity class I |
| 35 – 39.9 | Obesity class II |
| 40 and above | Obesity class III |
BMI can't tell muscle from fat, so treat it as a rough guide. Ideal weight is calculated at BMI 22.