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Criteria for using body mass index (BMI) as a measure of obesity in children and adults
| Category | Children | Adults | |
|---|---|---|---|
| Underweight | BMI <5th percentile of age | <18.5 kg/m2 | |
| Normal weight | BMI ≥5th to 85th percentile of age | 18.5-22.9 kg/m2 | |
| Overweight | BMI ≥85th to 95th percentile of age | 23-24.9 kg/m2 | |
| Obesity | BMI ≥95th percentile of age | Obesity grade 1 | 25-29.9 kg/m2 |
| Obesity grade 2 | 30-34.9 kg/m2 | ||
| Obesity grade 3 | >35 kg/m2 | ||
