Shoe Size Converter for US, UK, EU and CM
This shoe size converter translates a single size between the four most common sizing systems — US, UK, EU (European), and CM (Japan / Mondopoint) — so you can find the right fit when shopping across countries. Pick a system and a size, and the matching size appears instantly.
It is built for buying shoes online from another country, traveling abroad, or simply checking how your size reads on a label. Because US and UK sizes differ by gender, you get separate charts for Men and Women, while EU and CM stay unisex.
How to Convert Your Shoe Size
Select gender
Choose Men or Women. US and UK sizes use separate scales per gender, so this sets the correct chart. EU and CM stay the same either way.
Choose the From system
In the From dropdown, pick the sizing system you already know — US, UK, EU, or CM (JP).
Pick your size
Select your shoe size from the size dropdown. The list updates automatically for the system and gender you chose.
Read the result
The converted size appears instantly in the To box, and the All Systems panel lists every equivalent at once. Use the Swap button to reverse the direction, and check the highlighted row in the size chart below.
Features
Four Sizing Systems
Convert between US, UK, EU, and CM (Japan / Mondopoint) standards from one place.
Men and Women Charts
Separate conversion tables for men's and women's shoes, since US and UK sizes differ by gender.
All Systems at Once
Pick a size and the All Systems panel shows the equivalent in every system simultaneously.
Quick Swap
Reverse the From and To systems instantly with the Swap button — no need to reselect.
Full Size Chart
A complete conversion table that highlights and scrolls to the matching row when you select a size.
Popular Conversion Pages
Dedicated pages for common pairs: US to EU, EU to US, and UK to US, each preset to that direction.
Understanding the Size Systems
US
Uses separate scales for men and women, based on the Barleycorn system.
UK
Similar to US but with a different offset, and also gender-specific.
EU
Unisex system built on the Paris Point (each size step is about 6.67 mm), so one number fits both men and women.
CM (JP)
Measures actual foot length in centimeters. Used in Japan and as Mondopoint internationally — the most direct system.
Frequently Asked Questions
How do I convert a US shoe size to UK?
Select your gender, set the From system to US and the To system to UK, then pick your US size. As a rule of thumb, UK men's sizes run about half a size to a size smaller than US men's, while the gap is larger for women. The tool applies the exact chart values for you.
How do I convert a US size to EU?
Choose your gender, set From to US and To to EU, and select your US size. The matching EU number appears instantly in the To box, and the All Systems panel shows the UK and CM equivalents at the same time.
Are EU shoe sizes the same for men and women?
Yes. EU sizes are unisex, so an EU 40 is the same physical size regardless of gender. CM is unisex too. The difference only appears in the US and UK systems, which use separate scales for men and women.
How do men's and women's shoe sizes differ?
In the US system, women's sizes run roughly 1.5 to 2 numbers larger than the men's size for the same foot length — for example, a US men's 8 fits about the same as a US women's 9.5. Switching the gender toggle loads the correct chart so you do not have to do the math yourself.
How do I convert CM to a shoe size?
CM is the foot length in centimeters, used in Japan and as Mondopoint. Set the From system to CM (JP), pick your foot length, and the tool returns the matching US, UK, and EU sizes. If you do not know your CM, measure your longest foot from heel to toe.
How accurate are these conversions?
The data follows widely used international sizing standards, but real fit varies between brands and shoe styles. Treat the result as a reliable starting point and check a brand's own size chart when one is available.
Should I size up or down when converting?
If your converted size falls between two values, sizing up is usually safer for comfort. Also consider the shoe type — running shoes often fit better a half size larger, while dress shoes can sit more snugly.
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