| Classification for Adults | BMI |
|---|---|
| Underweight | <18.5 |
| Normal | 18.5–24.9 |
| Overweight | 25.0–29.9 |
| Class I | 30.0–34.9 |
| Class II | 35.0–39.9 |
| Class III (extreme) | >40.0 |
| Classification for Children > 2 Years | BMI Status (CDC, 2005) |
| Normal weight for height | 10th–85th percentile |
| At risk for overweight | 85th–95th percentile |
| Overweight | >95th percentile |
Reference:
Greenspan's Basic & Clinical Endocrinology 8th Edition