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How To Calculate BMI And Check The BMI Ranges

What is BMI?
BMI stands for Body Mass Index is a measure of relative size based on the mass and height of an individual. BMI is used to determine whether the patients are underweight, overweight, healthy weight or clinically obese.

BMI can be calculated by dividing the body weight with square of their height. If the weight is in kilograms and the height in metres then use this method to calculate

For Example 
Weight 80 kilograms
Height 1.5 meters
1.5 x 1.5 = 2.25
80 divided by 2.25 = BMI is 35.5

If pounds and inches are used, a conversion factor of 703 (kg/m^2)/(lb/in^2) must be applied.

For Example
Weight 170 lbs
Height 65 inches (5.4 feet)
65^2  = 4225
170 multiplied by 703 divided by 4,225 = BMI 28.2

After calculating BMI now check the BMI ranges as follows

  • BMI less than 18.5 - Underweight
  • BMI between 18.5 and 25 - Healthy weight
  • BMI between 25 and 30 - Overweight
  • BMI between 30 and 40 - Obese
  • BMI over 40 - Very obese, morbidly obese


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