Body Fat Calculator

Chart your BMI against the national average

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Health dangers due to obesity

These dangers are associated with overweight and obese adults

Adults with a BMI of greater than 25 (overweight) or whose BMI is greater than 30 (obese) have an increased risk for a number of diseases and health conditions, including,:

BMI Origins

Devised all the way back in way back in 1830, the Body Mass Index is a single figure used to as a way of measuring a person's body shape. Put simply, it is calculated by dividing the body's weight by the square of their height. Eg: Kilograms: weight, divided by Metres (Meters): height. b m i Prime is a variation of the Quetelet index. Put simply, if you have a Prime of less than 0.74, you are underweight. If your prime is more than 0.74 and less than 1.00, your weight is ideal. If your bmi prime is more than 1 you are defined as being overweight.

The simple maths

BMI is determined using the formual below
  • BMI = weight(kilograms) / height2 (metres2)         (Metric Units)
  • BMI = 703 . weight(pounds) / height2 (inches2)         (Imperial Units)

BMI limitations

BMI categories are generally regarded as a satisfactory tool for measuring whether sedentary individuals are underweight, overweight or obese with various exceptions, such as: athletes, children, the elderly, and the infirm.
See wikipedia.org/wiki/Body_mass_index#Limitationsinfomation.