Body Frame Size Calculator
Your frame changes ideal weight.
Body Frame Size Calculator
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Calculated instantly
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What This Calculator Does
The Body Frame Size Calculator classifies your frame as small, medium, or large based on wrist circumference relative to height. Body frame size adjusts what a healthy weight range means for your build.
How It Works
Measure your wrist circumference just above the wrist bone. Divide by height and multiply by 100. Men: below 8.9 small, 8.9-10.0 medium, above 10.0 large.
Example
A 175 cm tall man with a 17 cm wrist: ratio = 17 / 175 x 100 = 9.7, classified as medium frame.
Formula
Ratio = (Wrist / Height) x 100Reading the Results
Wrist-to-Height Ratio
Men: <8.9 small, 8.9-10.0 medium, >10.0 large. Women: <9.2 small, 9.2-10.2 medium, >10.2 large.
Frequently Asked Questions
How does frame size affect ideal weight?
Large-framed individuals naturally carry more bone mass and weigh more at the same height.
How do I measure my wrist?
Wrap a flexible tape around the narrowest part of your wrist, just above the wrist bone.
Is frame size genetic?
Yes. Bone structure is largely determined by genetics and does not change significantly with weight loss or gain.