⚖️ WHO Clinical Body Mass Index
BMI Calculator – Body Mass Index & Healthy Weight Range
Check your Body Mass Index (BMI) using World Health Organization (WHO) benchmarks. Calculate your ideal weight range, BMI category, and health status in seconds.
World Health Organization (WHO) BMI Classification
Body Mass Index (BMI) is a clinical screening metric that quantifies tissue mass based on height and weight. The official WHO BMI scale defines:
| Category | BMI Range (kg/m²) | Health Risk Level |
|---|---|---|
| Underweight | < 18.5 | Nutritional deficiency, lower immunity |
| Normal Weight | 18.5 – 24.9 | Lowest clinical mortality risk |
| Overweight | 25.0 – 29.9 | Moderate risk of cardiovascular strain |
| Obesity (Class I, II, III) | ≥ 30.0 | High risk of type-2 diabetes, hypertension |
How is BMI Calculated?
The standard formula is: BMI = weight (kg) / [height (m)]². In imperial units, the formula is: BMI = 703 × weight (lbs) / [height (in)]².