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.
Body Mass Index Formula
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)