BMI calculator

Calculate BMI from height and weight and see the WHO category bands.

Calculated in this browser. Nothing is sent anywhere.

BMI is a screening number only — it does not measure body fat, muscle, or health. Bands follow WHO criteria used in Japan (18.5 / 25 / 30).

How to use

  1. Enter height in cm and weight in kg.
  2. Calculate.
  3. Read the BMI, its category, and the normal-weight range.

What it supports

BMI is a screening number, not a health diagnosis — it does not measure body fat or muscle. Bands follow WHO criteria used in Japan (18.5 / 25 / 30).

Related tools

Related guides