BMI Graphed for Women

Chart your BMI against the national average

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Risks of 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

Devised all the way back in way back in 1830, the BMI 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. Bmi Prime is a variation of the Quetelet index. 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.

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 for more information.