BMI Calculator
Calculate body mass index from your height and weight.
Unit: cm (e.g. 170)
Unit: kg
BMI calculator
Computes body mass index from height and weight.
Uses BMI = weight(kg) ÷ height(m)² to show whether you fall in underweight, normal, overweight, or obese (WHO ranges).
- WHO: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese.E.g. 170 cm, 70 kg → BMI ≈ 24.2 (normal range).
- BMI (body mass index)
- BMI is weight in kg divided by height in metres squared. It is a simple screening tool for weight category but does not reflect muscle mass or body shape.
- WHO weight categories
- WHO classifies BMI ≥ 25 as overweight and ≥ 30 as obese. Some Asian guidelines use lower cut-offs (e.g. 23 for overweight, 25 for obese).