BMI Calculator
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Body Mass Index (BMI) is a simple measure of body fat based on height and weight. It was devised by Adolphe Quetelet in the 1830s and is widely used by healthcare professionals as a screening tool for weight categories.
Metric: BMI = weight (kg) ÷ height (m)²
Imperial: BMI = (weight (lb) × 703) ÷ height (in)²
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | 30.0 and above |
BMI does not distinguish between muscle and fat mass. Athletes with high muscle mass may have a high BMI but low body fat. BMI should be used as a general guideline, not a definitive diagnosis. Consult a healthcare professional for a complete health assessment.