Body Mass Index is a person’s weight in kilograms divided by their height in meters squared. According to the International Federation of Obesity and Metabolic Surgery (IFSO) standards, obesity is diagnosed when the body mass index is 30 kg/m2 or higher.
For example, if a person is 165 centimeters tall and weighs 65 kg, we first calculate the square of the person’s height in meters. So 1.65 meters times 1.65 meters equals 2.72. When 65 kg is divided by 2.72, the result is 23.89. In this case, it means that the person is at a healthy weight in line with the data we have indicated in the table. If the same person weighed 100 kg, his body mass index would be around 36, and in this case, the person would be diagnosed as severely obese.
• Under 18.5 – Underweight, 18.5 – 24.9 – Normal Weight, 25.0 – 29.9 – Overweight, 30.0 – 39.9 – Obesity, 40.5 – 49.9 — Morbid Obesity, 50 and over – Super Obesity.