Thursday, 24 October 2013

Formula for How to Work Out Your BMI Body Mass Index

BMI stands for Body Mass Index and is used to work out whether a person is at their ideal weight or whether they are or over- or under-weight.  The Body Mass Index is used for adult men and women.  To determine a person's BMI, their weight and height are looked at in order to do the calculation.

The basic formula for how to work out your BMI (Body Mass Index) is:

Your weight (in pounds) divided by the square of your height (in inches), multiplied by 703.


Here's an example:

Example of formula for how to work out your BMI Body Mass Index. Weight divided by square of your height multiplied by 703, using pounds and inches.


Alternatively, to calculate your BMI in metric, you don't need to use the "multiply by 703".  Here's the formula for how to work out your BMI (Body Mass Index) in METRIC:

Your weight (in kilograms) divided by the square of your height (in meters).


What Your BMI Score Indicates:

  • Under 18.5  =  Underweight
  • Over 18.5 and under 24.9  =  Normal weight
  • 25 and Over, up to 29.9  =  Overweight
  • 30 and Over  =  Obesity

N.B.  It's always advisable to consult your doctor or health care professional if you are concerned about your BMI or weight.






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