Foot length in cm to US women's shoe size
Measure your foot in cm, then enter the length to get your US women's size.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter foot length.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
US women's = 3 × foot length (in) - 20.5, with 1 in = 2.54 cm. The result is rounded to the nearest half size, following the ISO/TS 19407 formulas.
Example
Inputs: Foot length = 24 cm. Result: US women's size: 8; Exact value before rounding: 7.85; KR and CN size: 240 mm.
Limits and caveats
- Brands and models can differ from this chart by up to one size, so check the brand's own chart when you have it.
- Based on the ISO/TS 19407 formulas; US women's sizes follow the common scale (men's + 1.5).
- Foot width and shape are not taken into account.
Questions about this tool
What is a 24 cm foot in US women's sizes?
It is US women's 8 using the ISO/TS 19407 formulas; the exact value before rounding is 7.85.
Why does a brand's chart differ from this foot length in cm to US women's result?
Each brand rounds its sizes and builds its lasts its own way, so its chart can be up to one size off. Measuring your foot in cm is the most reliable check.
Should I add extra length to my measurement?
No. Enter the bare foot length; the formulas already include an allowance of about two sizes between the foot and the shoe.