Body Type Calculator

This calculator takes three measurements -- shoulder, waist, and hip width -- and builds two independent ratios from them: Shoulder to Hip Ratio and Waist to Hip Ratio. Neither ratio uses all three measurements: Shoulder to Hip Ratio responds only to shoulder and hip width and completely ignores waist width, while Waist to Hip Ratio responds only to waist and hip width and completely ignores shoulder width. Body Shape (the text classification like "Hourglass" or "Inverted Triangle") is then determined by a chain of threshold checks against both ratios together, so a shape label can flip even from a small change in just one measurement if it happens to cross one of those thresholds.

Somatotype scoring (endomorph, mesomorph, ectomorph percentages) uses a third derived ratio -- Shoulder to Waist -- alongside Waist to Hip Ratio, and assigns points to whichever tendency the measurements suggest most strongly; a tie between the top two scores is reported as a combined type like "Mesomorph-Ectomorph" rather than picking one. This tool applies common fitness-industry body shape and somatotype heuristics; it's a rough visual/proportional classification, not a validated anthropometric or medical measurement.