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Calculate Your Score

Φ

Establish the GRI Foundation.
Then achieve the GRI Formula.

GRI Foundation Calculator

Φ

Calculate your ideal waist measurement using the GRI Foundation Formula.

GRI Formula Calculator

Φ

Calculate your ideal shoulder-to-waist ratio using the GRI Formula. 

IDEAL PHYSIQUE

GRI Waist: Height × 0.45

GRI Shoulder: Waist × 1.618

GRI Formula: Shoulder / Waist = 1.618

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MEASURE        •        ANALYZE        •        IMPROVE

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