Body Mass Index (BMI)
BMI is a useful measure of overweight and obesity. It is calculated from your height and weight. BMI is an estimate of body fat and a good gauge of your risk for diseases that can occur with more body fat. The higher your BMI, the higher your risk for certain diseases such as heart disease, high blood pressure, type 2 diabetes, gallstones, breathing problems, and certain cancers.
Although BMI can be used for most men and women, it does have some limits:
- It may overestimate body fat in athletes and others who have a muscular build.
- It may underestimate body fat in older persons and others who have lost muscle.
Severe thinness - Less than 15.99
Moderate thinness - 16.00 - 16.99
Mild thinness - 17.00-18.49
Normal weight - 18.50-24.99
Overweight - 25.00-29.99
Obese - class I - 30.00-34.99
Obese - class II - 35.00-39.99
Obese - class III - Greater than 40
Information from: National Heart Lung and Blood Institute