Body Type Calculator
Estimate your frame size from wrist circumference and height, plus an informal ecto/meso/endomorph body-type label — descriptive, not diagnostic.
Updated August 3, 2026
Medical Disclaimer: This tool provides general estimates for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional or registered dietitian before making significant changes to your diet, exercise, or health routine. Read our full Medical Disclaimer.
How This Is Calculated
This calculator leads with wrist-circumference-based frame size, which has direct grounding in skeletal bone structure. It also offers an optional, purely informal ecto/meso/endomorph label for people who want it — presented as descriptive, not scientific.
Step 1: Determine Frame Size From Wrist Circumference and Height
Using your height and wrist circumference, we compare the ratio between them against the historical Metropolitan Life Insurance frame-size reference tables to classify your frame as small, medium, or large.
Step 2: Optionally Estimate an Informal Body-Type Label
If you enter waist, hip, and shoulder measurements, we use their relative proportions to suggest a leaning toward ectomorph, mesomorph, or endomorph — the informal somatotype labels popularized by Sheldon (1940). These labels are widely searched but are not a rigorous scientific classification.
Step 3: Present Results as Descriptive, Not Diagnostic
Because the body-type label is the part most likely to be over-read, we place a plain disclaimer directly next to your result: this describes general build, not your metabolism, training response, or fat distribution.
A Note on Accuracy
Frame size from wrist circumference has some anthropometric grounding in bone structure, but the ecto/meso/endomorph labels are informal and descriptive, not a scientifically rigorous classification. Neither should be read as predicting your metabolism, training response, or fat distribution.
Frequently Asked Questions
Is My Body Type Label a Scientific Classification?
No. The ecto/meso/endomorph labels are informal descriptive terms people commonly search for, not a rigorous scientific classification. Frame size from wrist circumference has more direct anthropometric grounding, but even that is a general reference, not a diagnosis.
Does My Body Type Predict My Metabolism or How I'll Respond to Training?
No. This is a common overclaim in body-type content. Your frame size and informal body-type label describe general build, not how your metabolism works or how you'll respond to a specific training or nutrition plan.
Why Is Wrist Circumference Used for Frame Size?
Wrist circumference relative to height has long been used as a simple proxy for skeletal frame size, since it's less affected by body fat than other measurements. It comes from the historical Metropolitan Life Insurance frame-size tables.
Do I Need to Enter Waist, Hip, and Shoulder Measurements?
No, those are optional. Height, weight, and wrist circumference are enough for a frame-size result. Waist, hip, and shoulder measurements are only used to generate the optional informal ecto/meso/endomorph label.
Sources
Metropolitan Life Insurance Company frame-size tables — historical reference, still the standard wrist-based frame-size method
The Varieties of Human Physique — Sheldon, W.H. (1940), cited as the historical origin of the somatotype labels, not current evidence