BMI Calculator

An easy to use website for learning about your body mass index (BMI).

Body mass index (BMI) is an estimate of body fat.

BMI Calculator

Feet: Inches:

Weight (pounds):


BMI is a screening tool. It is not diagnostic.

The correlation between body mass index and body fatness is fairly strong at a population level. However gender, age and athletic fitness can create incorrect fatness assessment for some people.

Because height and weight are the only parameters in the body mass index, it does not consider muscle mass. So muscular people can have an overweight score. Similarly, a person with little muscle and some fat may have a normal BMI score.

Other Methods

Waist Circumference

According to the National Heart, Lung & Blood Institute, waist circumference is a good indicator of abdominal fat. Abdominal fat is a predictor of risk for developing high blood pressure, cardiovascular disease, diabetes and other conditions.

You can determine your waist circumference by placing a flexible tape measure snugly around your waist. Waist measurement of over 40 inches for men and over 35 inches for women indicates increased health risk.

Additional Methods

  • skinfold thickness using calipers
  • impedence measurements, handheld or built into scales
  • hydrostatic underwater weighing
  • dual-energy x-ray absorption (DEXA)

Learn More

BMI Chart

BMI Chart thumbnail View Full Size BMI Chart »

Survey Data

Gender Overweight Obese
Male 40% 32%
Female 28% 36%
Source: National Health and Nutrition Examination Survey 2007–08.


References »