Shoulder-to-Waist Ratio Calculator

About this calculator

The shoulder-to-waist ratio — shoulder circumference divided by waist circumference — is bodybuilding and physique culture’s standard measure of the “V-taper”: broad shoulders tapering down to a narrow waist. A ratio around 1.6 is widely cited as the classic aesthetic target, since it lands close to the golden ratio (1.618), which physique coaches and aesthetics writers have referenced since the Steve Reeves era of bodybuilding as the proportion the eye reads as most balanced.

Competitive bodybuilders and physique athletes train specifically toward this ratio — building lat width and shoulder mass while keeping waist circumference tight through diet and core training — because judges in categories like Men’s Physique and Classic Physique score the visual V-taper directly, and because knowing the exact waist measurement that would hit 1.618 at your current shoulder width gives a concrete, individualized target rather than a generic body-fat percentage goal.

Enter your shoulder and waist circumference, and this calculator gives you your current ratio, where it falls categorically, and the waist measurement that would put you exactly at the golden ratio.