About

Identifying your somatotype or geometric body shape is the first step towards curating a wardrobe that enhances your natural proportions rather than fighting them. In fitness, it helps tailor workout programs to balance muscle development. This calculator compares the circumferences of your shoulders, bust, waist, and hips to classify your silhouette into one of the 5 primary archetypes.

Using ratio analysis rather than absolute size, this tool provides a scalable result applicable to any weight or height. It features a unique Dynamic Morphing Silhouette that adjusts visually to reflect your input data, providing immediate feedback on how your proportions stack up.

Formulas

The algorithm calculates the difference percentage. Let S=Shoulders, W=Waist, H=Hips.

{

IF (H > S × 1.05) → PearIF (S > H × 1.05) → Inv. TriangleIF (W > H × 1.05 ∧ W > S × 1.05) → AppleELSE Rectangle or Hourglass (depends on waist)

Reference Data

Shape	Characteristic Ratio	Description	Focus Area
Hourglass	(Bust ≈ Hips) > Waist	Shoulders and hips are balanced; waist is defined.	Maintain balance.
Pear (Triangle)	Hips > Bust	Hips are significantly wider than shoulders/bust.	Build upper body.
Apple (Round)	Waist > (Hips & Bust)	Waist is the widest point; limbs often slender.	Core strength, cardio.
Rectangle	Bust ≈ Waist ≈ Hips	Little definition between waist and hips.	Create curves.
Inverted Triangle	Shoulders > Hips	Broad shoulders or bust; narrow hips.	Build glutes/legs.

Frequently Asked Questions

Place the tape measure at the tip of one shoulder and wrap it all the way around your body (unlike shoulder width which is just across the back). The tape should be parallel to the floor.

Generally, your skeletal structure and fat distribution patterns remain consistent. An "Hourglass" will likely remain an hourglass whether they gain or lose weight, though the definition may soften.

Yes. Many people fall in between categories (e.g., a "Rectangle" with "Pear" tendencies). Use the advice that resonates most with your primary concern.