Shoe sizing varies by country, and the US, UK, and EU systems use different scales that don't line up with a simple offset, making it easy to order the wrong size when shopping from an international retailer. This tool converts between all three systems, plus an approximate foot length in centimeters.
Sizing also differs between men's and women's shoes even within the same country, since women's US sizes typically run about 1.5 sizes higher than the equivalent men's size for the same foot length — this tool accounts for that with a category toggle.
Because shoe sizing conventions vary somewhat between brands and manufacturers, treat the result as a close approximation and check a specific brand's size chart when precision matters.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
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If you find yourself needing this often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
This page works the same way on a phone, tablet, or desktop browser, so switching devices doesn't mean relearning a different interface.
Frequently asked questions
Are these conversions exact across all brands?
They follow standard sizing conventions, but individual brands sometimes size slightly differently, so checking a brand's own chart is wise for a first order.
Why is there a foot length in centimeters?
Foot length is the most consistent, brand-independent way to check fit, since it's a direct physical measurement rather than a sizing label.