Frame Size Calculator

Reviewed by the CalculatorHub team, edited by James Graham. Method from MedlinePlus Body frame size. Last verified 2026-06-23.

The Frame Size Calculator computes frame size from the relation frame ratio = height in cm divided by wrist circumference in cm. It takes 2 inputs (height in cm, wrist circumference in cm) and returns the frame size. Because this is a pure mathematical or physical formula rather than a jurisdiction-specific rule, the result never changes over time: the same inputs always produce the same answer, so you can rely on it whether you are checking homework, sizing a design, or sanity-checking another tool. Enter your values in the fields below and the result updates instantly; you can also share a permalink that pre-fills the exact calculation, which is useful for teaching, reports, or collaboration. For example, with height = 180 cm, wrist circumference = 17 cm, the frame size works out to 10.588235, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by MedlinePlus Body frame size, and the figure above each result carries the date it was last verified. This tool is general information and is not a substitute for professional engineering, medical, financial, or scientific advice; always check critical results against the primary source and your own judgement.