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How do you know you are obese?
How to calculate how obese you are!

Most doctors calculate obesity using a formula known as the
Body Mass Index (BMI).

It is a measure based on height and weight that applies to both adult men and women.
To calculate your BMI divide your weight in kilograms by the square of your height in metres.

A BMI of 25 to 29.9 is considered overweight and one of 30 or above is considered obese.
Doctors have recently recognised a new category: those with a BMI above 40 are considered morbidly obese.
People with BMIs between 19 and 22 live longest. Death rates are noticeably higher for people with indexes 25 and above.
However, the BMI is not infallible. For instance, it is possible for a healthy, muscular athlete with very low body fat to be classified obese using the BMI formula.

Calculated by dividing weight in kilograms by height in square metres. 
Normal: 18.5 - 24.9
Overweight: 25 - 29.9
Obese: Above 30
Morbidly Obese: Above 40