






The BMI of Body Mass Index is a measurement based on a person's
mass (measured in kilograms or pounds) and their height (measured in metres
or inches). The BMI formula differs depending on whether you are using the
metric or imperial system for your units of measure. Below is the formula for calculating body
mass index;


For metric
measurements use your height in kilograms divided by your height in metres
(i.e 1.75) squared. An example would be a man who weighs 80kg and is 1.75m
tall. The equation is 80kg/(1.75*1.75) = 80/3.06 = 26.1 which is classed in
the overweight category.



Metric













We will use
the same man as above but convert the units. 80kg = 176lbs and 1.75m (175cm)
equates to 68.9 inches. In this case we divide the mass (176lbs) by our
height in inches squared. 176/(68.9*68.9) = 176/4747.21 which = 0.037. Then
we multiply by 703 which gives us 26.1 also.



Imperial











Your Weight in Kilograms (kg):


BMI:



Your Height In Centimeters (cm):










Your Weight in Pounds (lbs):


BMI:



Your Height In Inches:






Very severely underweight

less than 15



Severely underweight

from 15.0 to 16.0


Underweight

from 16.0 to 18.5


Normal (healthy weight)

from 18.5 to 25


Overweight

from 25 to 30


Obese Class I (Moderately obese)

from 30 to 35


Obese Class II (Severely obese)

from 35 to 40



