Graph your BMI against the healthy norm

## Being overweight is dangerous

*These risks are linked with overweight and obese adults*

Adults whose BMI is greater than 25 (

*overweight*) or with a BMI greater than 30 (

*obese*) have a greater risk of varied diseases and health conditions, including,:

## Derivation

B.M.I. Prime is simple way of defining a single figure that is not immedieately related to any other units of measurement, but which can 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

BMI, sometimes 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 your body weight divided by the square of their height.

## Formula for BMI

Body Mass is actually calculated thusly:

- BMI = weight(kilograms) / height
^{2} (metres^{2}) (Metric Units)
- BMI = 703 . weight(pounds) / height
^{2} (inches^{2}) (Imperial Units)

## BMI limitations

BMI is proportional to the mass and inversely proportional to the square of the height. So, if all body dimensions double, and mass scales naturally with the cube of the height, then BMI doubles instead of remaining the same. This results in taller people having a reported BMI that is uncharacteristically high, compared to their actual body fat levels.

*See wikipedia.org/wiki/Body_mass_index#Limitationsinfomation*.