The Body Mass Index (BMI) is an internationally recognised standard for classifying overweight and obesity in adults. BMI is calculated by dividing the weight in kilograms by the square of the height in metres.
To find out your BMI, enter your details below and click 'What is my BMI?'.
BMI of 0 to 18.5 - Underweight
Risk of comorbidity: Low (but risk of other clinical problems increased)
BMI of 18.5 to 25 - Normal Weight Range
Risk of comorbidity: Average
BMI of 25 to 30 - Overweight
Risk of comorbidity: Increased
BMI of 30+ - Obese (Class 1)
Risk of comorbidity: Moderate
BMI of 30+ - Obese (Class 2)
Risk of comorbidity: Severe
BMI of 30+ - Obese (Class 3)
Risk of comorbidity: Very Severe