BMI Calculation

If you are concerned about your weight, whether you are overweight or underweight, the calculation of your BMI (Body Mass Index) will help you to put things in perspective, and ascertain if you really do have a weight problem.

The calculation of BMI actually requires only a simple formula. You can either do a calculation in either English measures (feet, inches, and pounds), or metric measures (metres, centimetres, and kilograms). The resultant BMI should be the same.

Metric Formula For The Calculation of BMI

The calculation of Body Mass Index can be done using kilograms and metres (or centimetres).

BMI =

Weight in Kilograms 
(Height in Meters) x (Height in Meters)

or

BMI = (

Weight in Kilograms 
(Height in centimeters) x (Height in centimeters)

) x 10,000

For example, a person who weighs 84 Kilograms and is 1.8 (180 centimeters) tall has a BMI of 25.9. The BMI calculation is:

84 Kg 
(1.80 m) x (1.80 m)

= 25.9 which is just in the over weight zone.

Or in centimetres the BMI calculation is:

84 Kg 
(180 m) x (180 m)

x 10,000 = 25.9

English Formula For The Calculation Of BMI

The BMI calculation can also be done using English measurements using pounds and inches, with this equation

BMI = (

Weight in Pounds 
(Height in inches) x (Height in inches)

) x 703

For example, a person weighing 150 pounds and is 5 feet 6 inches tall has a BMI of 24.2. The BMI calculation is:

(

150 lbs. 
(66 inches) x (66 inches)

) x 703 = 24.2

If you do not like to do the BMI calculation yourself, you can use the calculator below for the English calculation. For this, you must have a browser with Javascript enabled. The BMI calculator is free to use.

I suggest you bookmark this page so you can come back and check your BMI calculation as your weight changes.

Want To Know Your BMI? Don't Like Maths? Javascript On Your Browser?