Ectomorph, mesomorph or endomorph?
Enter your wrist circumference, shoulder width and hip width and see your dominant somatotype instantly, along with your ecto / meso / endo blend, your frame size, and training and nutrition pointers matched to your type.
Your measurements
Measure around your wrist just above the wrist bone.
Measure from one shoulder edge to the other across the back.
Measure at the widest point of your hips.
Body type thresholds differ by sex.
Wrist circumference indicates skeletal frame size and the shoulder-to-hip ratio indicates build shape. The two are combined into an ecto / meso / endo blend. Results update as you type.
What your body type means
Your ecto / meso / endo blend
Frame size thresholds for your sex
The three somatotypes side by side
Typical traits of each pure type. The highlighted column direction is your dominant type in the rows below.
| Trait | Ectomorph | Mesomorph | Endomorph |
|---|
Body types, explained
The Three Somatotypes
The somatotype system classifies body types into three categories: ectomorphs (lean and long), mesomorphs (muscular and medium), and endomorphs (wider and rounder). Most people are a blend of two types rather than a pure type. Understanding your dominant somatotype can help guide nutrition and training decisions.
Ectomorph Characteristics
Ectomorphs tend to have narrow shoulders, a small wrist circumference (under 6.5 inches for men), long limbs, and difficulty gaining weight. They typically have a fast metabolism and low body fat. Training focus should be on heavy compound lifts with lower volume and a calorie surplus for muscle gain.
Mesomorph Characteristics
Mesomorphs are naturally muscular with medium-sized bone structures, broad shoulders relative to hips, and a wrist circumference of 6.5-7.5 inches for men. They respond well to both strength training and cardio. Mesomorphs can gain muscle and lose fat relatively easily with consistent effort.
Endomorph Characteristics
Endomorphs tend to have wider hips, larger wrist circumferences (over 7.5 inches for men), and a tendency to store fat easily. They often have good strength potential and build muscle well but need to pay closer attention to diet. Higher protein intake and regular cardio alongside resistance training works best.
Common questions
Can I change my body type?
You cannot change your skeletal structure and genetic tendencies, but you can dramatically change your body composition through diet and exercise. An endomorph can achieve a lean, muscular physique, and an ectomorph can build significant muscle mass. Body type is a starting point, not a destiny.
How is body type determined?
This calculator uses wrist circumference (indicating frame size) and shoulder-to-hip ratio to estimate your dominant somatotype. Wrist circumference is a reliable indicator of skeletal frame size because the wrist has very little fat or muscle to skew the measurement.
Are most people a mix of body types?
Yes, most people display characteristics of two or even all three somatotypes. It is common to be an ecto-mesomorph (lean and muscular) or an endo-mesomorph (muscular but gains fat easily). Pure somatotypes are relatively rare.
Does body type affect how I should eat?
Your body type can inform your starting macro ratios. Ectomorphs often do well with higher carbs (55/25/20 carb/protein/fat). Mesomorphs thrive on balanced macros (40/30/30). Endomorphs may benefit from lower carbs (25/35/40). These are starting points, adjust based on results.
The somatotype system is an orientation tool, not settled science. It estimates tendencies from a few skeletal measurements and cannot capture your metabolism, hormones, training history or body composition. Most people are a blend of two types, and any type can build muscle or lose fat with the right plan. Use your result as a starting point for training and nutrition choices, not as a label or a limit, and talk to a qualified coach or health professional before making major changes.