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Body Mass Index (BMI) & Weight Calculator
Calculates official WHO Body Mass Index, health classification, and healthy ideal weight range for adults.
World Health Organization (WHO) BMI Ranges
| Category | BMI Range (kg/m²) | Health Status & Summary |
|---|---|---|
| Underweight | < 18.5 | Below optimal body mass; higher risk of nutritional deficiency. |
| Healthy / Normal Weight | 18.5 – 24.9 | Lowest statistical risk of cardiovascular & metabolic issues. |
| Overweight | 25.0 – 29.9 | Moderate excess body weight relative to height. |
| Obese (Class I–III) | ≥ 30.0 | Higher risk profile; structured lifestyle or medical consultation advised. |