Obesity is a medical condition in which body fat is cumulated to an extent that harmfully affects health. It is measured through the BMI, which is closely associated to the fat mass and the overall total body weight.
BMI
< 18.5
Underweight
18.5 – 24.9
Normal
25 – 29.9
Overweight
30 – 34.9
Obese Class I
35 - 39.9
Obese Class II
> 40
Obese Class III
The BMI value is defined as the body mass divided by the square of the body height, and is universally expressed in the metric system or American units of measurement.