Last updated October 10, 2026 · Report an error
Shoe sizing systems differ by country and by brand, making it hard to know your size when shopping internationally.
This converter translates a known shoe size between US Men's, US Women's, UK, EU, and centimeter foot length using a standard adult sizing chart.
How it works
Enter your known size and select which sizing system it's in. The calculator finds that size on a standard unisex adult conversion chart (interpolating between listed sizes if needed) and reads across the row for the equivalent size in every other system.
- Enter known size.
- Enter size system.
- Click Calculate to see your results.
Examples
US Men's 9
A US Men's size 9 converts to approximately US Women's 10.5, UK 8, EU 42, and a 26 cm foot length.
Who should use it
- Converting a shoe size before ordering from an international or overseas retailer.
- Understanding how your size compares across US, UK, and EU sizing systems.
Industry applications
- Footwear retail and e-commerce
- International shopping and travel
Advantages
- Converts between five common sizing systems in a single lookup.
- Uses interpolation for sizes that fall between standard chart entries.
Limitations
- Sizing varies by brand — treat results as a close estimate, not an exact guarantee of fit.
Common mistakes to avoid
- Assuming EU and UK sizes shift by a fixed offset — the relationship isn't perfectly linear across the full size range.
- Comparing a US Men's size directly to a US Women's size without converting, since they're not the same scale.
Best practices
- When buying from an international retailer, measure your actual foot length in centimeters for the most reliable conversion.
Tips
- Foot length in centimeters is the most universal reference point — measure both feet (they're often slightly different sizes) and size for the larger one.
Frequently asked questions
Yes, with no signup and no limit on how many conversions you run.
Shoe sizing isn't governed by one universal formula — different manufacturers use slightly different lasts (the foot-shaped mold used to build a shoe), so always check a brand's specific size chart when possible.
US Women's sizes run about 1.5 sizes larger than the equivalent US Men's size for the same foot length (e.g. Men's 9 ≈ Women's 10.5).
Yes, for the most accurate conversion — measure your foot length in centimeters and use that as the input system for the most brand-independent result.