Metric:BMI = kg / (m²). Convert cm → m by dividing by 100.
Imperial:BMI = 703 × lb / in².
WHO adult ranges: <16 Severe thinness; 16–16.9 Moderate; 17–18.4 Mild (Underweight); 18.5–24.9 Normal; 25.0–29.9 Overweight; 30.0–34.9 Obesity I; 35.0–39.9 Obesity II; ≥40 Obesity III.
Limitations: Doesn’t measure body fat or distribution; athletic or older adults may need other assessments.
Tip: Use the unit switcher; examples auto-fill the form.
Conversions & notes
1 inch = 2.54 cm · 1 lb = 0.453592 kg.
Healthy evaluation includes waist circumference, medical history, labs, and clinician input.
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