Convert a shoe size between US Men's, US Women's, UK, and EU sizing systems.
Shoe sizing systems differ between the US, UK, and EU (and between men's and women's sizing within the US). This calculator uses commonly published offset formulas to approximate a conversion between systems.
A US Men's size 9 converts to roughly a US Women's 10.5, a UK 8.5, and an EU 42.
Are these conversions exact? They are close approximations - actual fit varies by brand and shoe last, so always check a brand's specific size chart when possible.
Using standard conversion charts based on foot length, since sizing systems differ by region.
Brands can have slightly different shoe shape molds ("lasts"), causing fit variation.
Yes — directly measuring is generally more reliable than converting between systems.