Body Type Calculator

Understanding the Three Body Types

The somatotype system classifies human physiques into three categories: ectomorph, mesomorph, and endomorph. Ectomorphs have a lean build with long limbs and a fast metabolism, often finding it difficult to gain weight or muscle. Mesomorphs are naturally athletic with a medium frame, broad shoulders, and the ability to gain muscle quickly. Endomorphs tend to have a wider build, store fat more easily, and often have a slower metabolism. Most people are not purely one type — they fall somewhere on a spectrum between two or all three categories.

How the Somatotype System Works

Originally developed by psychologist William Sheldon in the 1940s, the somatotype system was later refined by Heath and Carter into a quantifiable method. This calculator uses a simplified version that analyzes your height-to-weight ratio (HWR), shoulder-to-waist ratio, BMI, and wrist circumference to estimate your ectomorphy, mesomorphy, and endomorphy scores. Each score is rated on a scale of 1 to 7. The highest score determines your dominant body type, and if two scores are close, you receive a mixed classification like ecto-mesomorph.

Exercise Tips for Each Body Type

Ectomorphs benefit from heavy compound lifts with lower reps and longer rest periods. Limit cardio to 2-3 short sessions per week to avoid burning excess calories. Mesomorphs respond well to a mix of strength training and moderate cardio — 4-5 sessions per week with varied intensity keeps progress steady. Endomorphs should prioritize high-intensity interval training (HIIT) combined with resistance training to boost metabolism and build lean muscle mass.

Diet Recommendations by Body Type

Ectomorphs typically need a caloric surplus with a higher carbohydrate ratio (50% carbs, 25% protein, 25% fat) to support muscle growth. Mesomorphs thrive on a balanced macro split (40% carbs, 30% protein, 30% fat) and can adjust based on goals. Endomorphs often benefit from a lower-carb approach (25% carbs, 35% protein, 40% fat) to manage insulin response and body composition. Regardless of body type, prioritize whole foods, adequate protein, and consistent meal timing.

Can You Change Your Body Type?

While your skeletal structure and natural tendencies are largely genetic, body composition is highly modifiable through training and nutrition. An ectomorph can build significant muscle with progressive overload and a caloric surplus. An endomorph can achieve a lean physique through consistent training and dietary discipline. Think of your somatotype as a starting point, not a limitation. Understanding your body type helps you choose the most effective strategies for your goals rather than fighting against your natural predispositions.