Calcolatore BMI

BMI Calculator

Body Mass Index (BMI) is a common adult screening index for weight status. This tool supports metric/imperial units and China, WHO, Japan, Singapore cut-offs, plus healthy weight range, ideal weight, Ponderal index, and reverse target-weight calculation.

Formula

BMI = weight(kg) ÷ height(m)². Example: 170 cm, 65 kg → 65 ÷ 1.70² ≈ 22.5.

Healthy weight range = normal BMI bounds × height². China: about 18.5×h² to 23.9×h².

Ponderal index = weight(kg) ÷ height(m)³.

China vs WHO

• China (WS/T 428): overweight ≥24, obese ≥28
• WHO: overweight ≥25, obese ≥30
• Singapore (Asian): healthy to 22.9, high risk ≥27.5

Notes

• For adults ≈18+; children need growth-chart percentiles.
• Not ideal alone for pregnancy, athletes with high muscle mass, or severe edema/sarcopenia.
• BMI does not separate fat vs muscle or show fat distribution.

Disclaimer: For self-check only—not medical advice.