Body Mass Index (BMI)

Quickly measure and calculate your BMI

Body Mass Index (BMI) is a standardized formula to determine the ratio between height and weight. BMI is a fairly reliable indicator of body fat for most adults, though not for the elderly or those with a lot of muscle tone. It is best used to quickly categorize someone as underweight, normal weight, overweight, or obese.

BMI Protocol

Equipment

Scale

Procedure

Use a U.S. standard scale and input weight in pounds, and height in feet and inches.

BMI Calculation

ft
in
lbs

Calculation Result

DATE
Weight (lbs)
BMI (kg/m2)
BMI Classification

BMI Comparison Chart

CLASSIFICATION FROM (kg/m2) TO (kg/m2)
Under Weight 0.0 18.4
Normal Weight 18.5 24.9
Over Weight 25.0 29.9
Obesity Class I 30.0 34.9
Obesity Class II 35.0 39.9
Obesity Class III 40.0 >40.0

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