BMI Calculator

Calculates your body mass index in either imperial, metric or US units. Valid for age 20 and over.

Body mass index (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.

Use the BMI Calculator to estimate your body fat.

The BMI score means the following:

ClassificationBMI (kg/m2)
underweightlower than 18.5
normal18.5-24.9
overweight25.0-29.9
class I obesity 30.0-34.9
class II obesity35.0-39.9
class III obesityover 40.0