Body Frame Size Calculator
Classify your frame from wrist circumference and height.
Frame size
Medium
height ÷ wrist = 10.3
Why it matters
±5 kg on ideal-weight estimates
Reading bone structure
Wrist circumference proxies skeletal breadth, which height alone misses. Dividing height by wrist sorts frames: for men, above 10.4 reads small and below 9.6 large (women: 11 and 10.1). Frame explains why two healthy people of one height can differ 10 kg.
Apply it to targets
Ideal-weight formulas assume a medium frame; small frames sit comfortably ~5% below the formula weight and large frames ~5% above. It's a refinement for setting expectations — body composition still tells you more than any skeleton-based estimate.
Frequently asked questions
- How does the Body Frame Size Calculator work?
- Classify your frame from wrist circumference and height.
- Is the Body Frame Size Calculator free to use?
- Yes. The Body Frame Size Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
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