Body Frame Size Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter your height and wrist circumference in cm.
- Read the ratio and frame size.
How it works
Divide height by wrist circumference. A higher ratio indicates a smaller frame; thresholds are approximate.
Worked example
180 cm height, 17 cm wrist. Ratio 10.6 → small frame.
Common mistakes
- Treating it as exact — thresholds vary by sex and source, so it's a rough guide.
- Measuring the wrist over the wrist bone rather than just above it.
Frequently asked questions
Why does frame size matter?
It helps interpret 'ideal weight' ranges — a larger frame naturally carries more. This is a guide, not medical advice.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.