BMI Calculator

The severity of your obesity is determined by a measurement of your Body Mass Index (BMI). Enter your weight and height in the calculator below(in either imperial or metric) to find out what your current BMI is and what effect losing some or all of your excess weight will have.

Weight  st  lb =  kg
Height  ft  in =  m
      BMI = 22.1 kg/m2
© Dr Ian Sidwell, Somerset Obesity Service, 2003

 

BMI Definitions BMI (kg/m2)
Underweight < 18
Healthy weight 18 – 25
Overweight 25 – 30
Obese 30 – 35
Severely obese 35 – 40
Morbidly obese 40 and over