About this calculator
Calculate adult body mass index from height and weight.
Formula
Metric: BMI = weight (kg) ÷ height² (m). Imperial: BMI = 703 × weight (lb) ÷ height² (in).
Example
70 kg at 175 cm gives a BMI of about 22.9.
Important
BMI is a population-level screening measure. It does not measure body fat directly and may not reflect individual health or body composition. Do not use it as a diagnosis.