Scientists have created a formula to tell if a person is obese or not. It is known as Body Mass Index or BMI. 
 To find your Body Mass Index in the metric system:  Divide your weight in kilograms by your height in meters. Divide the result again by your height in meters.  
 For instance, a 2 meter-tall person with a weight of 100 kilograms has a BMI of 25.