Graph your BMI

What is a healthy bmi

Calculate my BMI

Health risks from being overweight

These consequences are related to overweight and obese adults

Adults whose BMI is greater than 25 (overweight) or whose Body Mass Index is greater than 30 (obese) have a heightened risk for divers diseases and health conditions, including,:


Body Mass Index Prime is method of using the results of the BMI calculations to quickly and easily rank a person into a category. Eg:
  • BMI Prime < 0.74 = Underweight.
  • BMI Prime > 0.74 and < 1.00 = Optimal weight
  • BMI Prime > 1 = Overweight
The BMI, also known as the Quetelet index, is a measure used to estimate a person's body shape based upon a person' weight and height. It originated in Belguim around the 1840's by Adolphe Quetelet. It is a simple calculation based on the individual's body weight divided by the square of their height.

The formula

How Body Mass Index is worked out
  • BMI = weight(kilograms) / height2 (metres2)         (Metric Units)
  • BMI = 703 . weight(pounds) / height2 (inches2)         (Imperial Units)

BMI limitations

BMI calculations do not differentiate between muscle mass and fat mass.
See for more information.