See your BMI on a graph

Chart your BMI against the national average

Check my BMI

Health dangers due to obesity

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 Origins

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 less than 0.74 = Underweight.
  • BMI Prime greater than 0.74 and less than 1.00 = Optimal weight.
  • BMI Prime greater than 1 = Overweight
This app will calculate your body mass index and tell you if you are underweight, overweight or if your weight is optimal. Just enter your vital statistics and click the button. Your result will be shown on a graph for you.

How it's calculated

You can use the following formula to calculate 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.