BMI Calculator

Body Mass Index - Body Mass Index (BMI) is a measure of a person's weight relative to his or her height. It does not measure the amount of fat or muscle a person is carrying, but is used to estimate healthy body weight.

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A person weighing 300-pounds could have a very different body mass index depending on his or her height.

Example 1:

Weight Height BMI

Person A 300 pounds 6'5" 36

Person B 300 pounds 5'5" 50

A person measuring 6-feet could have a very different body mass index depending on his or her weight.
Example 2:

Weight Height BMI

Person A 200 pounds 6' 27

Person B 300 pounds 6' 41

Classification	BMI
Underweight	<18.50
Normal range	18.50 - 24.99
Normal range	18.50 - 24.99
Overweight	≥25.00
Obese	≥30.00
Obese class I	30.00 - 34-99
Obese class II	35.00 - 39.99
Obese class III	≥40.00

Source: Adapted from WHO, 1995, WHO, 2000 and WHO 2004