BMI categories used in India
| BMI | Asian cut-off | International (WHO) |
|---|---|---|
| Below 18.5 | Underweight | Underweight |
| 18.5–22.9 | Normal | Normal |
| 23–24.9 | Overweight | Normal |
| 25 and above | Obese | Overweight (obese from 30) |
South Asians tend to carry more body fat and face higher diabetes and heart risk at a lower BMI, so Indian guidelines use the lower Asia-Pacific cut-offs.
Formula
BMI = weight (kg) ÷ height (m)². Example: 80 kg at 1.80 m gives 80 ÷ 3.24 = 24.7, which is overweight by the Asian cut-offs.
BMI doesn't separate muscle from fat. Athletes can show a high BMI while being lean. Waist size (under 90 cm for men and 80 cm for women is commonly advised in India) adds useful context.