Translations:Obesity/6/en

Classification

Main article: Classification of obesity

Category	BMI (kg/m2)
Underweight	< 18.5
Normal weight	18.5 – 24.9
Overweight	25.0 – 29.9
Obese (class I)	30.0 – 34.9
Obese (class II)	35.0 – 39.9
Obese (class III)	≥ 40.0

A "super obese" male with a BMI of 53 kg/m²: weight 182 kg (401 lb), height 185 cm (6 ft 1 in). He presents with stretch marks and enlarged breasts.

Obesity is typically defined as a substantial accumulation of body fat that could impact health. Medical organizations tend to classify people as obese based on body mass index (BMI) – a ratio of a person's weight in kilograms to the square of their height in meters. For adults, the World Health Organization (WHO) defines "overweight" as a BMI 25 or higher, and "obese" as a BMI 30 or higher. The U.S. Centers for Disease Control and Prevention (CDC) further subdivides obesity based on BMI, with a BMI 30 to 35 called class 1 obesity; 35 to 40, class 2 obesity; and 40+, class 3 obesity.