BMI Calculator
Body Mass Index — check your healthy weight range
yrs
ft
in
lbs
—
—
Underweight
Normal
Overweight
Obese
Healthy BMI Range
18.5 – 25
kg/m² (WHO Standard)
Healthy Weight Range
—
for your height
BMI Prime
—
ratio to upper normal limit (25)
Ponderal Index
—
kg/m³
BMI Categories — WHO Classification (Adults)
| Classification | BMI Range (kg/m²) |
|---|---|
| Severe Thinness | < 16 |
| Moderate Thinness | 16 – 17 |
| Mild Thinness | 17 – 18.5 |
| Normal Weight | 18.5 – 25 |
| Overweight | 25 – 30 |
| Obese Class I | 30 – 35 |
| Obese Class II | 35 – 40 |
| Obese Class III | > 40 |
BMI Limitations: BMI is a screening tool, not a diagnostic measure. It does not distinguish between fat and muscle mass, bone density, or fat distribution. Athletes may show elevated BMI despite low body fat. Always consult a healthcare professional for a comprehensive health assessment.