BMI = weight (kg) ÷ height (m)²
| Range | Category | | --- | --- | | < 18.5 | Underweight | | 18.5 – 24.9 | Normal | | 25 – 29.9 | Overweight | | ≥ 30 | Obese |
BMI is a useful first screen but does not distinguish muscle from fat. Athletes and people with high muscle mass may have a high BMI without health risk.