| Category | BMI range-kg/m2 |
| Very severely underweight | less than 15 |
| Severely underweight | 5.0 to 6.0 |
| Underweight | 16.0 to 18.5 |
| Normal (healthy weight) | 18.5 to 25 |
| Overweight | 25 to 30 |
| Obese Class I (Moderately obese) | 30 to 35 |
| Obese Class II (Severely obese) | 35 to 40 |
| Obese Class III (Very severely obese) | over 40 |