Body type calculator: find your somatotype

Frame size comes from your height divided by your wrist circumference, a standard method used in nutrition guides. A small frame pushes toward ectomorph, a large frame toward endomorph or mesomorph. BMI and waist-to-height then show how much mass that frame carries.

Shoulder-to-waist ratio separates a muscular build from a heavier one with similar weight. A high ratio adds to the mesomorph score; a high waist-to-height adds to endomorph. The three scores become percentages, so you see your mix rather than a single label.

Somatotypes were proposed in the 1940s and are now used loosely in fitness. They describe tendencies, not destiny. Training and nutrition move your scores over time, so recalculate every few months if you're working toward a goal.

Measure in the morning, before eating, in light clothing. Keep the tape snug but not tight and parallel to the floor. For shoulders, wrap the tape around the widest point over your arms with them relaxed at your sides. Small errors matter less than consistency, so use the same method each time you recalculate and compare trends rather than single results.