Calculator
Body Mass Index (BMI)
Adult BMI with two reference scales — international WHO and Asia-Pacific (WHO 2004 / IDF). Switch between them to see the category change.
BMI = weight (kg) ÷ height (m)²
kg
cm
BMI does not distinguish muscle from fat. In athletes, pregnancy and oedema, interpret with caution. Asia-Pacific cut-offs (lower thresholds) are widely used for South-East Asian populations.
BMI
—kg / m²
Category
—
< 18.5 Underweight
18.5–24.9 Normal
25.0–29.9 Overweight
30.0–34.9 Obese class I
35.0–39.9 Obese class II
≥ 40.0 Obese class III
Enter weight and height.