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| The Quételet Index (l’homme moyen) 1832 World Health Organization/National Institutes of Health (USA) Body mass index (BMI) = W/H2 or kg/m2 | |
|---|---|
| BMI (kg/m2) | |
| Recommended weight | 18.5–24.9 |
| Overweight | 25.0–29.9 |
| Obesity | ⩾30 |
| Class I | 30–34.9 |
| Class II | 35–39.9 |
| Class III (morbid obesity) | ⩾40 |
| with comorbidities | ⩾35 |
| Super (extreme) obesity (8.0%) | ⩾50 |
