Health professionals measure whether a person is overweight or obese using a calculation that takes into account that person’s height and weight. It’s called the Body Mass Index (BMI).
An adult is considered overweight if his or her BMI is 25 or higher, and obese if the BMI is 30 or higher. But with children, physicians also take age into consideration, since body fat changes as kids grow. A 2-year-old with a BMI of 19.3 would be considered overweight, for example, as would a 9-year-old with a BMI of 21 or a 13-year-old with a BMI of 25.1.
Overweight refers to excess weight in relation to height. But it may or may not be due to excess body fat; an increase in lean muscle, in athletes for example, can also qualify as “overweight.”
The Body Mass Index (BMI) is calculated with the formula weight in kilogram divided by body height to square. To make it easy for visitor of your web page to calculate the Body Mass Index (BMI), use the Free BMI Widget/BMI-Club for your website . Please take also a look at More about Body Mass Index (BMI).