How does the Body Adiposity Index work?

BAI = Hip (cm) / Height (m)^1.5 − 18 Then: Healthy male: 8–20%; Female: 21–33% Then: Validated against DXA scan measurements Then: No weight scale needed — useful in field settings.

Can you give an example of how to use the Body Adiposity Index?

Example: Input Hip 100cm, height 1.75m gives a result of BAI = 100/1.75^1.5 − 18 = 25.3%.

Is the Body Adiposity Index free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Body Adiposity Index?

Our Body Adiposity Index uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Body Adiposity Index

Body Adiposity Index (BAI)

Hip Circumference (cm)

Height (cm)

The Body Adiposity Index (BAI) estimates body fat % from hip circumference and height without needing weight. Proposed 2011 as an alternative to BMI.

Symbol	Name	Unit	Description
Hip	Hip circumference	Centimeters	—
Height	Height	Meters	—
BAI	Body adiposity index	Percentage body fat estimate	—

Category	Men	Women
Athletes	6–13%	14–20%
Fitness	14–17%	21–24%
Average	18–24%	25–31%
Obese	≥25%	≥32%

References

›Body Adiposity Index — Wikipedia

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Body Adiposity Index

Body Adiposity Index (BAI)

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Body Adiposity Index (BAI)