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Body Mass Index Formula
If you are unable to use the BMI calculator, or if you are interested
in how BMI is calculated, this page has the mathematical formulas. You
can calculate BMI 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 |
What Does This All Mean?
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 |
What Does This All Mean?
BMI Table for Adults
For adults BMI can also be found by using
Body Mass Index for Adults Table (PDF-15K)
This document is provided in Portable Document Format (pdf).
Learn more about Acrobat
Reader .
BMI for children and teens (2 - 20 years) is plotted on age and gender
specific growth charts. For more information link to BMI
for Children and Teens .
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