Shoe Size Converter
Convert shoe sizes between US, UK, EU and centimeters for men and women using standard sizing charts. Find your size in any system. Free, private, instant.
Last reviewed by the Radiatus Cloud team
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Convert shoe sizes across systems
Shoe sizes are numbered differently between countries, and buying footwear from abroad reliably requires converting between the systems. This converter moves between US, UK, EU and centimetre shoe sizes, for both men and women, so you can order the right size wherever the seller is based rather than guessing at an unfamiliar number.
Why shoe sizing is inconsistent
Different regions number their shoe sizes in genuinely different ways, and the systems do not line up in any simple fashion: a US size is not the same number as the equivalent UK or EU size, and on top of that men’s and women’s sizes are numbered differently within each individual system too. The single most reliable basis for getting it right is the actual length of the foot in centimetres, which is a fixed physical measurement, and that is exactly why it is included here. Converting between the various number systems, anchored wherever possible to that length, helps you buy the correct size when ordering from a country that uses a different system, and avoids the common and frustrating mistake of ordering shoes that do not fit.
A calculation, not advice
It runs entirely in your browser, so nothing you enter is uploaded and it works without an account, keeping your figures on your own machine and available on any device immediately.
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Frequently Asked Questions
Why do shoe sizes differ between countries?
Because each region numbers sizes differently, and the systems do not align simply, so a US number differs from the UK and EU numbers for the same shoe.
What is the most reliable basis?
The actual foot length in centimetres, which is why it is included, since number-based systems vary while a physical length is fixed.
Does it handle men’s and women’s sizes?
Yes. Sizes are numbered differently for men and women within each system, so the converter accounts for that difference.
When is this useful?
When buying shoes from a country that uses a different sizing system, to order the right size and avoid a costly wrong-size purchase.
Is my data uploaded?
No. The conversion runs entirely in your browser.
Privacy & Security
All processing happens locally in your browser — nothing is uploaded.
How to Use
Choose gender and your size in any system to see the equivalents.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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