Body Type Calculator
Discover your metabolic body type (Somatotype)
Body Type Calculator
Biological sex affects bone density and frame standards.
Your height in inches (5ft = 60in, 5ft 10in = 70in).
Measure around your wrist bone.
Based on your results, you might benefit from Noom — Psychology-based weight loss for your body type
Start TrialUnderstanding your body type (Somatotype) is the missing link in many fitness journeys. Whether you are an Ectomorph (naturally thin), Mesomorph (athletic), or Endomorph (prone to weight gain), this calculator uses the wrist-to-height ratio method to identify your genetic frame size.
How to Use This Body Type Calculator
- 1Select your gender.
- 2Enter your height in inches.
- 3Measure your wrist circumference just below the hand.
- 4Enter your wrist size in inches.
- 5Click Calculate to reveal your Somatotype and get customized fitness advice.
Understanding Your Results
The result identifies you as one of three main somatotypes: **Ectomorph** (Small Frame), **Mesomorph** (Medium Frame), or **Endomorph** (Large Frame). While few people are 100% one type, knowing your dominant structure helps optimize your caloric intake and training style (e.g. Endo's often need fewer carbs than Ecto's).
Frequently Asked Questions
**Ectomorphs** are naturally lean with small frames and fast metabolisms. **Mesomorphs** are athletic, build muscle easily, and have medium frames. **Endomorphs** have larger bone structures, slower metabolisms, and gain both muscle and fat easily.
Yes! Most people are a combination, such as Ecto-Mesomorph (lean but muscular) or Meso-Endomorph (strong but soft). This calculator identifies your dominant frame size, which is the strongest indicator of your baseline somatotype.
The wrist measurement method is a standard anthropometric technique used to estimate skeletal frame size. Since frame size is highly correlated with metabolic type (somatotype), it provides a scientifically grounded starting point, though it cannot account for muscle mass or current body fat levels.
Ectomorphs should focus on high-calorie diets with plenty of complex carbs to fuel muscle growth. Training should prioritize heavy compound lifts (squats, deadlifts) with longer rest periods and minimal cardio to prevent burning too many calories.
Endomorphs usually benefit from high-intensity interval training (HIIT) and metabolic conditioning to boost calorie burn. A lower-carb, higher-protein diet often works best to manage insulin sensitivity and body composition.
Your skeletal frame size (wrist/height ratio) does not change once you stop growing. However, your metabolism slows down with age, meaning an Ectomorph might start storing fat like an Endomorph if they become sedentary. This is why lifestyle often trumps genetics.
You cannot change your bone structure (frame size), but you can absolutely change your body composition. An "Ectomorph" can become a muscular bodybuilder, and an "Endomorph" can become a lean marathon runner—it just requires different strategies and effort levels.
If you are borderline (e.g., right between Small and Medium), look at other factors like your ankle circumference, shoulder width, and how easily you gain weight. If you gain muscle easily, lean towards Mesomorph. If you struggle to gain weight, lean towards Ectomorph.