The formula for calculating BMI uses weight in kilograms and height in metres:
BMI (kg/m2) = Weight (kg) ÷ Height (m) 2.
It can also be calculated using weight in pounds and height in inches:
BMI (lb/in2) = Weight (lb) ÷ Height (in) 2 x 703.
Online calculators that automatically do the computations from an entered height and weight are a convenient method of determining BMI.
Definitions of overweight and obesity
Over 50 healthcare organisations around the world, use the same BMI standards to define adult overweight and obesity.
Morbidly Obese: 40+