Body Type Calculator
Estimate your skeletal frame size (small, medium or large) from your height and wrist circumference.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
This tool provides general educational estimates only and is not medical advice. It does not diagnose, treat, or replace guidance from a qualified healthcare provider. Consult a doctor for decisions about your health.
About the Body Type Calculator
The body type calculator estimates your skeletal frame size — small, medium or large — from your height and wrist circumference. The wrist is used because it carries little fat or muscle, so its size mainly reflects bone structure. Frame size helps explain why two people of the same height can have different healthy weights. The result also shows the body-type label commonly associated with each frame, but true somatotype rating requires several measurements, so treat that label as descriptive only.
How to use it
- 1Select your sex.
- 2Enter your height in centimetres.
- 3Measure your wrist just above the wrist bone and enter the circumference.
- 4Press Calculate to see your frame size.
Worked example
a man 178 cm tall with a 17 cm wrist has a height-to-wrist ratio of about 10.5. That is above 10.4, so the result is a small frame.
How it works
How it works
Your height in centimetres is divided by your wrist circumference in centimetres. For men, a ratio above 10.4 indicates a small frame, 9.6–10.4 a medium frame and below 9.6 a large frame; for women the cut-offs are 11.0 and 10.1. Frame size is a property of your skeleton, so it does not change with diet or training.
About body-type labels
The ectomorph, mesomorph and endomorph labels come from 1940s somatotype theory. A true somatotype rating uses several skinfold, bone and girth measurements, so the label shown here is only a loose description of frame size, not a scientific classification.
Who it is for
People setting a weight goal who want to account for bone structure.
Why it helps
Frame size helps put ideal-weight and BMI ranges into context.
Common use cases
- Choosing where in the healthy weight range to aim
- Understanding differences in build between people of the same height
Frequently asked questions
A:Ectomorph (lean), mesomorph (muscular) and endomorph (rounder). Most people are a blend.
A:Bone frame is fixed, but training and nutrition change muscle and fat.
Reviewed for accuracy · Last updated October 7, 2026
Formulas follow recognised clinical references — including WHO BMI classifications, the Mifflin-St Jeor equation, and Naegele’s rule — and are periodically checked against published reference values.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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