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Body Mass Index Formula

If you are unable to use the Body Mass Index calculator, or if you are interested in how Body Mass Index is calculated, this page has the mathematical formulas. You can calculate Body Mass Index using wither feet, inches, and pounds, or meters, centimeters, and kilograms.

English Formula

Body Mass Index can be calculated using pounds and inches with this equation

BMI = (             Weight in Pounds             
(Height in inches) x (Height in inches)
) x 703

For example, a person who weighs 220 pounds and is 6 feet 3 inches tall has a BMI of 27.5.

(             220 lbs.            
(75 inches) x (75 inches)
) x 703 = 27.5


Metric Formula

Body Mass Index can also be calculated using kilograms and meters (or centimeters).

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 99.79 Kilograms and is 1.905 Meters (190.50 centimeters) tall has a BMI of 27.5.

            99.79 Kg            
(1.905 m) x (1.905 m)
= 27.5

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Buy The Book This Site Is Based On
U.S. Army Field Manual 21-20 is the source material for this website. A soldier's level of physical fitness has a direct impact on his combat readiness. The many battles in which American troops have fought under-score the important role physical fitness plays on the battlefield. The renewed nationwide interest in fitness has been accompanied by many research studies on the effects of regular participation in sound physical fitness programs. The overwhelming conclusion is that such programs enhance a person's quality of life, improve productivity, and bring about positive physical and mental changes. Not only are physically fit soldiers essential to the Army, they are also more likely to have enjoyable, productive lives, and you can too.

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