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Body Adiposity Index (BAI)

The Body Adiposity Index (BAI) is a method of estimating the amount of body fat in humans. The BAI is calculated without using body weight, unlike the body mass index (BMI). Instead, it uses the size of the hips compared to the person's height. The BAI is calculated as follows:

 

[(100 x hip circumference in Inches x 0.0254) / ((Height in Inches x 0.0254) x (square root of (height in Inches x 0.0254)))] - 18

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Click here for an online BAI Calculator.

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CLASSIFICATIONS FOR WOMEN

Age (years)

Underweight

Healthy

Overweight

Obese

20 - 39

Less than 21%

21% to 33%

Greater than 33%

Greater than 39%

40 - 59

Less than 23%

23% to 35%

Greater than 35%

Greater than 41%

60 - 79

Less than 25%

25% to 38%

Greater than 38%

Greater than 43%

CLASSIFICATIONS FOR MEN

Age (years)

Underweight

Healthy

Overweight

Obese

20 - 39

Less than 8%

8% to 21%

Greater than 21%

Greater than 26%

40 - 59

Less than 11%

11% to 23%

Greater than 23%

Greater than 29%

60 - 79

Less than 13%

13% to 25%

Greater than 25%

Greater than 31%

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