# Check my BMI

Chart your BMI against the national average

## Health difficulties from being overweight

These difficulties are associated with obese and overweight adults

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

## BMI Prime

BMI 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 the individual's body weight divided by the square of their height.

## How it's calculated

Use the body mass formula to get your bmi
• 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 wikipedia.org/wiki/Body_mass_index#Limitations for more information.