Body Mass Index Calculator

Body Mass Index (BMI) is a number calculated from a person's weight and height.

BMI is used as an screening tool to identify possible weight problems for adults/childs. However, BMI is not a diagnostic tool.

BMI correlates to direct measures of body fat, such as underwater weighing and dual energy x-ray absorptiometry (DXA).

BMI can be considered as an alternative for direct measures of body fat.

Additionally, BMI is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.


National Heart, Lung, and Blood Institute,