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Body Roundness Index (BRI) from Waist and Height Calculator

BRI = 364.2 − 365.5 × √(1 − (WC/(2π × 0.5×H))²).

Calculates Body Roundness Index BRI as a proxy for body fat distribution that outperforms BMI for cardiometabolic risk. BRI < 4.5 is lean; BRI > 6 is high adiposity.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

cm
cm

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BRI = 364.2 − 365.5 × √(1 − (WC/πH)²)

In depth

Calculates Body Roundness Index BRI as a proxy for body fat distribution that outperforms BMI for cardiometabolic risk. BRI < 4.5 is lean; BRI > 6 is high adiposity.