Skip to content

BMI Calculator

Work out body mass index from a height and a weight

Imperial height is in inches — 5 ft 9 in is 69.

What BMI is

Body mass index is a weight divided by a height squared, giving a single number that places an adult in a broad band. It is a rough public-health measure: it ignores muscle, frame and age, so treat it as one clue among several and not a diagnosis.