How does the Body Roundness Index (BRI) work?

W = waist circumference · H = height (same units) Then: BRI range: 1 (very lean) to ~15 (very obese).

Can you give an example of how to use the Body Roundness Index (BRI)?

Example: Input Waist 85cm · Height 175cm gives a result of BRI ≈ 3.4 (healthy range) (BRI < 4 generally lower risk).

Is the Body Roundness Index (BRI) 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 Roundness Index (BRI)?

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

Practic

Body Roundness Index (BRI)

🧬Body Roundness Index (BRI)

Waist circumference (cm)

Height (cm)

Body Roundness Index (BRI) uses waist circumference and height to estimate body roundness. BRI = 364.2 − 365.5√(1 − (W/2π)²/(0.5H)²). Better predictor of visceral fat than BMI.

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Did You Know?

BRI was developed in 2013 and better distinguishes apple vs pear body shapes than BMI.

References

›Body roundness index — PubMed

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Body Roundness Index (BRI)

🧬Body Roundness Index (BRI)

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