Metric:BMI = kg / (mΒ²). Convert cm β m by dividing by 100.
Imperial:BMI = 703 Γ lb / inΒ².
WHO adult ranges: <16 Severe thinness; 16β16.9 Moderate; 17β18.4 Mild (Underweight); 18.5β24.9 Normal; 25.0β29.9 Overweight; 30.0β34.9 Obesity I; 35.0β39.9 Obesity II; β₯40 Obesity III.
Limitations: Doesnβt 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 Β· 1 lb = 0.453592 kg.
Healthy evaluation includes waist circumference, medical history, labs, and clinician input.
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