Body type label: A general classification (Ectomorph, Mesomorph, Endomorph, or Balanced) based on your shoulder-to-hip proportions. These categories describe skeletal frame tendencies, not fitness level or health status.
Shoulder-to-hip ratio: Values above ~1.15 suggest a wider upper body relative to hips (common in mesomorph frames), while values near 1.0 indicate more balanced proportions. Ratios below ~0.95 suggest wider hips relative to shoulders.
Characteristics: A brief description of typical traits for your body type — things like where you tend to carry weight and general frame proportions. These are generalizations, not diagnoses.
Not a health assessment: Body type classification is a rough framework for understanding proportions. It does not predict health outcomes. Consult a healthcare provider for personalized fitness or nutrition guidance.
How This Calculator Works
You enter your shoulder, waist, and hip measurements in inches or centimeters, along with your gender. The tool converts to inches if needed, calculates your shoulder-to-hip ratio, and compares it against standard threshold ranges to classify your frame. Gender-specific thresholds are used because male and female skeletal proportions differ on average. The result is a simplified somatotype label — the classic three-type system popularized by William Sheldon in the 1940s.
Quick Questions
How do I measure my shoulders accurately?
Stand straight with arms relaxed at your sides. Have someone measure across the widest point of your shoulders — from the bony tip of one shoulder (acromion) to the other. Keep the tape level and snug but not tight.
Can my body type change over time?
Your skeletal frame is largely fixed, but body composition (muscle and fat distribution) absolutely changes with training and diet. Someone with an ectomorph frame can build significant muscle, and an endomorph frame can lean out considerably.
Are these body types scientifically validated?
Sheldon's original somatotype theory has been widely criticized in modern exercise science. The three-type system is a useful shorthand for general frame proportions, but it's an oversimplification. Most people are a blend of types rather than fitting neatly into one category.
Does gender affect the classification thresholds?
Yes — this calculator uses different ratio thresholds for male and female bodies because average skeletal proportions differ between sexes. Women typically have wider hips relative to shoulders, so the same ratio may classify differently depending on the gender selected.