Body Type Calculator
Determine body type (ectomorph, mesomorph, endomorph) for fitness planning. Free, fast, accurate — no signup, mobile-fri
Assessment Method
Basic Measurements
Frame Measurements
Body Shape Measurements
Somatotypes Overview
Ectomorph: Lean, fast metabolism, difficulty gaining weight
Mesomorph: Athletic, muscular, gains muscle easily
Endomorph: Rounder, slower metabolism, gains weight easily
Most people are a combination of types
Primary Body Type
Ectomorph
Naturally lean, fast metabolism
Secondary Type
Mesomorph
Significant secondary characteristics
Ectomorph
50%
Lean type
Mesomorph
50%
Athletic type
Endomorph
0%
Rounder type
Frame Size
Medium
Bone structure
Confidence
50%
Assessment accuracy
Somatotype Code
0-5-5
Endomorph-Mesomorph-Ectomorph (1-7 scale)
Key Characteristics
- • Naturally lean and thin
- • Fast metabolism
- • Difficulty gaining weight
- • Small frame and joints
- • Low body fat
How it works
A body type calculator classifies your build into one of three somatotypes — ectomorph (lean, narrow), mesomorph (muscular, athletic), or endomorph (broader, stores fat more easily) — from measurements like frame size and proportions. Most people are a blend.
Somatotypes
Ectomorph: slim, fast metabolism Mesomorph: muscular, gains easily Endomorph: rounder, slower metabolism
- frame
- bone structure (e.g. wrist circumference)
- proportions
- shoulder, waist, hip relationships
Worked example
- Narrow shoulders and wrists, finds it hard to gain weight
- Matches the lean, fast-metabolism profile
Predominantly ectomorph.
Good to know
- Somatotype is a general guide, not destiny — training and nutrition reshape your body regardless of type.
- Most people are a mix (e.g. ecto-mesomorph), not a pure category.
- Use it to tailor approach, not to limit expectations.