Convert shoe sizes between US, UK, EU, and foot length in centimeters, for men's and women's sizing.
📂 Size ConvertersFill in the fields on the left, then press the button to see your result instantly. Everything runs locally in your browser — no sign-up required, and no data is ever sent anywhere.
Shoe sizing systems differ substantially between regions — the United States, the United Kingdom, and continental Europe each use their own numbering scale, and none of them directly represents an actual physical measurement the way foot length in centimeters does. This tool uses foot length as the common reference point for all conversions: it first converts your known size (in whichever system you have it) into an estimated foot length in centimeters, using standard published shoe-sizing formulas that also account for the small but real difference between men's and women's size charts, then converts that foot length back into the other sizing systems. The EU scale used here follows the widely referenced "Paris point" system (each full size step equal to two-thirds of a centimeter of foot length), which is the basis most European shoe manufacturers use for their own size charts. Because none of the three regional systems is derived from the others, converting directly between them without a common physical reference would compound rounding errors.
Buying shoes from an international retailer, or simply owning shoes from brands based in different countries, quickly runs into a frustrating problem: a "size 9" means something different depending on whether it's a US, UK, or EU size — and none of those numbers is directly interchangeable with the others. A shoe size converter solves this by translating between systems so you can shop confidently regardless of which sizing standard a retailer uses.
The reason these systems don't line up neatly is that they were developed independently and use different starting points and unit steps. The US system and UK system are close in origin but offset from one another, while the EU system (often called the Paris point system) is based on a completely different unit: each full EU size represents two-thirds of a centimeter of foot length, a system that traces back to French shoemaking measurement conventions. Because none of these systems directly states a foot measurement, converting between them reliably means using standard published formulas that map each system back to an actual physical foot length in centimeters, then forward again into the target system — which is exactly the approach this tool takes.
An added complication is that men's and women's shoe sizes are not on the same numeric scale even for an identical foot length. A man's size 9 and a woman's size 9 correspond to different actual foot lengths, because the two size charts use different baseline offsets by long-standing industry convention — not because of any anatomical difference in how foot length relates to size. Selecting the correct gender category before converting is therefore just as important as entering the correct starting size.
One caveat worth keeping in mind: any sizing conversion, however standardized, is a close general reference rather than a guarantee of fit for a specific pair of shoes. Sizing can vary meaningfully between brands, and even between different shoe styles from the same brand (a running shoe and a dress shoe from the same company may fit differently at the "same" labeled size). When precision matters — for example, ordering shoes online without being able to try them on first — it's worth checking a brand's own size chart or, better yet, measuring your actual foot length in centimeters directly and comparing it to the brand's published measurements.
Men's and women's shoe size charts use different baseline offsets in their sizing formulas even for an identical foot length, which is a sizing-industry convention rather than a difference in actual foot anatomy between genders.
Sizing charts vary somewhat between individual shoe brands and even between different shoe styles from the same brand, so this conversion is a close general reference rather than a guaranteed exact fit for every specific shoe.
The EU (Paris point) sizing system is broadly standardized and used very widely across continental Europe, though some countries and brands do have minor regional variations.
Measuring your actual foot length in centimeters and comparing it against a specific brand's published size chart is generally more reliable than relying solely on a converted size number from a different system.