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IFPA Fitness Charts: BMI
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Body
Mass Index
Body mass index, or BMI is the measurement of choice for many
physicians and researchers studying obesity. Body mass index (BMI) is the preferred body composition
assessment for obese individuals because skinfold assessment becomes inaccurate because of the size of the
skinfold and the lack of standardized formulas for obese adults. BMI uses a mathematical formula that takes into account
both a person’s height and weight. BMI equals a person’s weight in kilograms divided by height in meters
squared. (BMI=kg/m2).
Nonmetric conversion formula for BMI
Weight/height2 x 703 =
Example: male weighing 170 lbs and is 5’8” (68in)
170/4624 x 703 = 24.9
BMI of 25
Classification – Overweight
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Risk of Associated Disease
According to BMI and Waist Size |
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BMI |
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Waist less than or equal to
40 in. (men) or 35 in. (women) |
Waist
greater than 40 in. (men) or 35 in. (women) |
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18.5 or less |
Underweight |
— |
N/A |
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18.5 - 24.9 |
Normal |
— |
N/A |
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25.0 - 29.9 |
Overweight |
Increased |
High |
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30.0 - 34.9 |
Obese |
High |
Obese |
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35.0 - 39.9 |
Obese II |
Obese |
Obese |
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40 or greater |
Extremely Obese III |
Extremely High |
Extremely High |
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Determining Your Body Mass Index (BMI)
The table below has already done the math and metric conversions. To
use the table, find the appropriate height in the left-hand column.
Move across the row to the given weight. The number at the top of
the column is the BMI for that height and weight.
Body
weight in pounds according to height and body mass index.
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Source: |
Adapted with permission from Bray, G.A., Gray, D.S.,
Obesity,
Part I, Pathogenesis, West J. Med. 1988: 149: 429-41. |
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