Calculate BMI

How to Calculate BMI

Your body mass index, or BMI, is a number calculated from your height and weight.  BMI provides a measurement standard to measure body fat.  It also categorizes people according to how likely they are to suffer from certain diseases based upon their weight.  This number is not the only thing used to determine a person’s chances of suffering from obesity-related diseases.  Factors such as other medical conditions, waist circumference and family history are considered as well.

How to Calculate Your BMI

BMI = weight (lb) / [height (in)]2 x 703

Calculate BMI by dividing weight in pounds (lbs) by height in inches (in) squared and multiplying by a conversion factor of 703.

Example: Weight = 150 lbs, Height = 5’5″ (65″)
Calculation: [150 ÷ (65)2] x 703 = 24.96

BMI Weight Status
Below 18.5           Underweight
18.5 – 24.9           Normal
25.0 – 29.9           Overweight
30.0 and Above     Obese

While BMI tends to be a fairly accurate measurement of body fat, there are exceptions.  For example, athletes can have higher BMIs because of increased muscularity rather than body fat.

People who fall into the overweight or obese ranges are more likely to suffer from diseases such as heart disease, type 2 diabetes, hypertension, stroke, sleep apnea and some cancers, among other serious health problems.