Body mass index (BMI) is a measurement based on height and weight as it relates to body fat, and can be used to determine how much risk a person has of developing certain health problems because of his or her weight. As a point of reference, someone with a BMI of 27 is approximately 20 percent overweight. The higher the BMI, the greater the risk a person has to develop additional health problems. Nutrition Authority is dedicated to helping you achieve weight loss through healthy eating.

Underweight Less than 18.5
Normal 18.5 – 24.9
Overweight 25 – 29.9
Obesity I 30 – 34.9
Obesity II 35 – 39.9
Extremely Obese III 40 and over