Weight-for-height index used for nutritional assessment and obesity classification
Weight
Height
—
BMI kg/m²
1618.525303540+
Weight used:— kg | Height used:— m
WHO BMI Classification
BMI (kg/m²)
Category
Health Risk
<16.0
Severe thinness
Very high
16.0–16.9
Moderate thinness
High
17.0–18.4
Mild thinness
Moderate
18.5–24.9
Normal weight
Average
25.0–29.9
Overweight (Pre-obese)
Increased
30.0–34.9
Obese Class I
Moderate
35.0–39.9
Obese Class II
Severe
≥40.0
Obese Class III (Morbid)
Very severe
BMI = Weight (kg) / Height (m)² Conversions: lbs ÷ 2.2046 = kg | (ft × 30.48) + (in × 2.54) = cm
Limitations: BMI does not distinguish fat from muscle mass. Athletes may have elevated BMI without excess fat. In elderly, a BMI of 23–27 may be protective. In Asian populations, overweight threshold is often set at 23.0 kg/m².
For clinical decision support only. Not a substitute for professional medical judgment.
