Health

Body Roundness Index (BRI) Calculator

Estimate body roundness from waist and height.

Waist circumference

Height

Calculated Output

Body roundness index 3.095

Formula: BRI = 364.2 − 365.5 × √(1 − eccentricity²)

Step-by-Step Breakdown

1. Values used:

2. Waist circumference = 85

3. Height = 175

5. Body roundness index = 3.095

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The math behind it

BRI uses waist and height to compute an eccentricity-based roundness score (typically ~1–16).

85 cm waist, 175 cm → ~3.4.

Higher means?

Rounder body shape — more central fat.