Free Online Body Type Calculator
Determine your dominant somatotype (Ectomorph, Mesomorph, or Endomorph) and your silhouette shape (Hourglass, Pear, Apple, Rectangle, or Inverted Triangle). This accurate body type calculator supports both US Imperial measurements (inches) and UK/EU Metric measurements (cm), utilizing anatomical proportion models from exercise science.
Understanding Somatotypes (Sheldon Theory)
The concept of somatotypes was developed in the 1940s by American psychologist William Herbert Sheldon. He hypothesized that human bodies can be categorized into three fundamental constitutional archetypes based on skeletal frame, fat storage tendencies, and muscularity. While most people are a combination of these types, one is often dominant:
- Ectomorph: Lean, light build, narrow shoulders and hips, thin bones, and a highly active metabolism. Ectomorphs find it difficult to gain weight, whether muscle or fat.
- Mesomorph: Naturally athletic frame, medium bone structure, broad shoulders, narrow waist, and a strong, muscular profile. Mesomorphs gain muscle easily and respond rapidly to resistance training.
- Endomorph: Broader bone structure, wider waist and hips, and a slower metabolic rate. Endomorphs store fat easily but also tend to possess significant muscle and physical strength.
Sheldon's somatotyping originally used a scale of 1 to 7 for each category. Today, fitness and healthcare professionals use the general archetypes to personalize training plans and nutritional strategies.
Body Silhouette Shapes Explained
Apart from somatotypes, your body shape represents how your skeletal structure and subcutaneous fat are distributed across the torso. We classify shapes using proportions between the shoulders, waist, and hips:
- Hourglass: Balanced shoulders and hips with a waist that is at least 25% smaller than both. This shape is considered symmetric and highly proportioned.
- Pear (Spoon/Triangle): Hips are significantly wider than the shoulders, shifting the visual weight of the frame to the lower body.
- Apple (Oval): The midsection is equal to or larger than the shoulders and hips, representing a central fat distribution.
- Rectangle (Banana): The shoulders, waist, and hips are of similar width, forming a straight silhouette without a highly defined waist indentation.
- Inverted Triangle: Broad shoulders and chest tapering down to significantly narrower waist and hips. This shape is standard in athletic builds.
Somatotype Comparison Table
The table below highlights the physical attributes, genetic tendencies, and general recommendations for the three primary body types.
| Somatotype | Physical Attributes | Metabolism | Training Goal | Nutrient Ratio (C/P/F) |
|---|---|---|---|---|
| Ectomorph | Long limbs, narrow joints, light bones | Very Fast | Hypertrophy & Strength | 50% Carb / 25% Protein / 25% Fat |
| Mesomorph | Wedge-shaped torso, athletic, muscular | Moderate | Lean Mass & Conditioning | 40% Carb / 30% Protein / 30% Fat |
| Endomorph | Soft build, round body, wider frame | Slow | Fat Loss & Metabolic Conditioning | 25% Carb / 35% Protein / 40% Fat |
Note: Most individuals are hybrids (e.g., ecto-mesomorphs or meso-endomorphs). Use these attributes as general guidelines. To use US Imperial measurements (inches) in this metric-based calculator, multiply your measurements in inches by 2.54 to convert them to UK/EU Metric centimeters (cm) (e.g., 30 inches × 2.54 = 76.2 cm).