Shoe Size Converter
Enter a US shoe size and select men's or women's sizing to convert instantly to UK, EU, and centimeter equivalents.
How the Shoe Size Converter formula works
This calculator uses standard published shoe size conversion charts for men's and women's sizing, interpolating between listed sizes as needed, since shoe sizing isn't defined by a single universal mathematical formula.
Step-by-step calculation
- Look up the entered US size in the standard conversion chart for the selected gender's sizing.
- If the exact size isn't listed, interpolate between the two nearest listed sizes.
- Read off the corresponding UK, EU, and centimeter values.
Worked example
A men's US size 9 converts to approximately UK 8.5, EU 42.5, and 27.3 cm foot length, based on standard sizing charts.
Frequently asked questions
Why do shoe sizes vary between brands even at the 'same' size?
Shoe sizing isn't standardized globally the way some units are — different brands and countries use slightly different lasts (the foot-shaped forms shoes are built on), so a size 9 from one brand can fit differently than a size 9 from another. This calculator uses common reference charts, but always check a specific brand's own size guide when possible.
Should I measure my foot length directly instead?
For the most reliable fit, measuring your actual foot length in centimeters and comparing it to a specific brand's size chart is more reliable than converting a size number alone.