Body Type Calculator

Determine your body type (ectomorph, mesomorph, endomorph) based on body measurements.

Result

Your Body Type
Ectomorph
Small Frame · Ratio: 10.6
Ideal Weight Range
130 - 158lbs

Lean build with long limbs, narrow shoulders, and fast metabolism. Naturally thin with difficulty gaining weight and muscle.

Training Focus

Heavy compound lifts (squats, deadlifts, bench press) with low volume

Diet Approach

Caloric surplus with higher carbs and protein

Cardio

Minimal cardio, focus on strength training

Body Type Comparison

Ectomorph
Lean, long limbs, fast metabolism
Mesomorph
Athletic, muscular, medium frame
Endomorph
Wider build, stores fat easily

Body type classification is a simplified framework. Most people are a combination of types. Use these guidelines as a starting point and adjust your training and nutrition based on how your body responds.

Calculation Complete

A body type calculator determines your somatotype (ectomorph, mesomorph, or endomorph) based on skeletal frame measurements, helping you tailor your training and nutrition strategy.

Enter your height, gender, and wrist circumference (measured at the narrowest point, just below the wrist bone). The calculator determines your body frame size and somatotype classification with tailored training and nutrition recommendations.

Examples

5'9" male with 6.5" wrist

Height: 175.3 cm. Wrist: 16.5 cm. Ratio: 175.3/16.5 = 10.6. Classification: Small frame, Ectomorph body type.

5'5" female with 6.25" wrist

Height: 165.1 cm. Wrist: 15.9 cm. Ratio: 165.1/15.9 = 10.4, inside the female medium band (10.1–11.0). Classification: Medium frame, Mesomorph body type, with an ideal weight range of 113–138 lb.

5'11" male with 7.75" wrist

Height: 180.3 cm. Wrist: 19.7 cm. Ratio: 180.3/19.7 = 9.2, below the male medium band (9.6–10.4). Classification: Large frame, Endomorph body type, with an ideal weight range of 170–208 lb.

Frequently Asked Questions

Where exactly should I measure my wrist?
At the narrowest point, just past the wrist bone on the hand side, where the wrist bends. Keep the tape snug but not tight; a measurement off by a quarter inch can move you across a frame-size boundary.
How does frame size change the ideal weight range?
It scales it. The calculator starts from the Hamwi estimate for your height and sex, multiplies it by 0.9 for a small frame or 1.1 for a large frame, then shows a range 10% either side of that figure.
Is this body type a scientific measurement?
Only loosely. The ectomorph, mesomorph and endomorph labels come from William Sheldon's 1940s somatotype theory, whose claimed links between physique and personality have been discredited. Here they describe skeletal frame size from a height-to-wrist ratio — a rough proxy, not a measure of body composition.
Can my body type change?
Your skeletal frame does not change, but you can significantly alter your body composition through training and nutrition. An ectomorph can build considerable muscle and an endomorph can become very lean.
Are most people a single body type?
No, most people are a blend of types. The classification is a spectrum, not a strict category. Use it as a starting point for training and nutrition, then adjust based on your individual response.

Sources

  1. Determining body frame size from wrist circumference — MedlinePlus, U.S. National Library of Medicine
  2. Somatotype and constitutional psychology — origin and criticism of the ectomorph/mesomorph/endomorph model — Wikipedia
Related Calculators
BMI Calculator
Body Fat Percentage Calculator
Ideal Weight Calculator
Lean Body Mass Calculator

Quick Tips

  • •Use your body type as a starting point, not a limitation — training and nutrition can dramatically change your body composition.
  • •Ectomorphs should prioritize caloric surplus and compound lifts; endomorphs benefit from higher protein and regular cardio.
  • •Reassess your approach every 8-12 weeks based on actual progress rather than body type alone.