Obesity is determined by measuring body weight and fat. There are different ways of calculating body fat. Body mass index (BMI) is one of the best methods used to measure body fat. It is a simple tool that helps to figure out the amount of excess body fat and the associated risks of carrying this extra weight. It can be applied to both men and women.
BMI is calculated as the ratio of the weight in Kg and height in square meter. Guidelines define overweight as a BMI between 25 and 29.9 kg/square meter and obesity as a BMI greater than 30.