🏥 BMI Calculator

Body Mass Index with WHO classification, BMI Prime, and Ponderal Index. Supports metric and imperial.

Your measurements

Height (cm)

Weight (kg)

Age (optional)

Sex (optional)

Your BMI

22.9

Normal weight

UnderweightNormalOverweightObese

Additional metrics

BMI22.86

BMI Prime0.914 (underweight)

Ponderal Index13.06 kg/m³

Healthy weight range56.7 – 76.3 kg

Healthy weight range (lb)124.9 – 168.1 lb

Weight to lose/gain for normalYou're in normal range

< 16.0Severe Thinness

16.0 – 16.9Moderate Thinness

17.0 – 18.4Mild Thinness

18.5 – 24.9Normal weight ✓

25.0 – 29.9Overweight

30.0 – 34.9Obese Class I

35.0 – 39.9Obese Class II

≥ 40.0Obese Class III