Body Type Calculator: What Is Your Somatotype?
Body types are classified into three somatotypes: ectomorphs (naturally lean, narrow frame, fast metabolism), mesomorphs (muscular, medium frame, athletic build), and endomorphs (wider frame, stores fat easily, strong). Most people are a blend of two types. Your body type influences optimal training...
Body Type Quiz
Answer the questions to discover your somatotype.
Your Body Type
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The Three Somatotypes
| Trait | Ectomorph | Mesomorph | Endomorph | |||||
|---|---|---|---|---|---|---|---|---|
| Frame | Narrow shoulders, long limbs | Broad shoulders, medium frame | Wide hips, stocky | |||||
| Muscle gain | Hard gainer | Gains muscle easily | Gains muscle and fat easily | |||||
| Fat storage | Low body fat naturally | Moderate | Stores fat easily | |||||
| Metabolism | Fast | Moderate | Slower | |||||
| Example athletes | Marathon runners, swimmers | Sprinters, gymnasts | Powerlifters, linemen | Training by Body Type | Approach | Ectomorph | Mesomorph | Endomorph |
| Focus | Heavy compound lifts | Balanced strength + conditioning | Strength + cardio | |||||
| Volume | Low-moderate (3-4 sets) | Moderate-high (4-5 sets) | Moderate (3-4 sets) | |||||
| Cardio | Minimal (2x/week, 20 min) | Moderate (3x/week, 30 min) | Regular (4-5x/week, 30-45 min) | |||||
| Rest periods | Longer (2-3 min) | Moderate (60-90 sec) | Shorter (30-60 sec) | Nutrition by Body Type | Macro Split | Ectomorph | Mesomorph | Endomorph |
| Protein | 25% | 30% | 35% | |||||
| Carbs | 55% | 40% | 25% | |||||
| Fat | 20% | 30% | 40% | |||||
| Calorie approach | Surplus (+300-500) | Maintenance or slight surplus | Deficit or maintenance |
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Frequently Asked Questions
What is a somatotype?
A somatotype is a classification of human body shape into three components: endomorphy (roundness/fat tendency), mesomorphy (muscularity), and ectomorphy (linearity/leanness). Each component is rated on a scale. Most people are a combination — pure types are rare. The system was developed by William Sheldon (1940s) and refined by Heath-Carter for sports science applications.
Can I change my body type?
You cannot change your skeletal frame (bone structure, limb length, hip/shoulder width), but you can significantly alter your body composition. An endomorph can become lean through diet and training. An ectomorph can build substantial muscle mass. Your body type describes your natural tendencies, not your limits. Training and nutrition strategies adapted to your type will be more efficient.
Is the somatotype system scientifically valid?
The Heath-Carter method is used in sports science and anthropometry. However, Sheldon's original theory linking body type to personality has been debunked. Modern sports science uses somatotyping as a practical tool for tailoring training programs, not as a rigid classification. Think of it as a starting point for nutrition and training, not a scientific law.
What if I am a mix of two body types?
Most people are a blend. Common combinations: ecto-mesomorph (lean and muscular), endo-mesomorph (muscular and stocky), meso-endomorph (athletic but gains fat easily). Your dominant type should guide your primary strategy, with adjustments from your secondary type. The calculator provides your blend score.
Does body type determine my diet?
Body type suggests tendencies, not requirements. Ectomorphs tend to tolerate more carbohydrates. Endomorphs often do better with lower carb, higher fat/protein approaches. Mesomorphs thrive on balanced macros. These are starting points — individual response to different diets varies more than body type alone predicts. Experiment and adjust based on your results.