About this Shoe Size Conversion
Shoe sizing systems vary significantly around the world. A US Women's 7 is a UK 5 and an EU 37-38. This converter helps you find the right fit when shopping international brands.
Who this calculator is for
- Online shoppers comparing US, UK, and EU shoe sizes.
- Travelers buying shoes from brands that use different sizing systems.
- Anyone who wants a rough foot-length estimate before ordering.
When to use it
- Convert a US shoe size into UK and EU equivalents.
- Estimate approximate foot length in centimeters.
- Compare shoe sizing before purchasing from an international brand.
How to use this calculator
- Select your Gender (Men's and Women's scales differ).
- Enter your US Size.
- The tool calculates the EU, UK, and approximate CM length.
Key assumptions
- The conversion is approximate and brand fit can vary.
- Men's and women's sizing scales are treated differently.
- You should still confirm fit with the brand's own size chart when possible.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Shoe sizes are roughly based on the length of the foot (barleycorns in UK/US, Paris points in EU).
* Men: UK ≈ US - 1. EU ≈ US + 33.
* Women: UK ≈ US - 2. EU ≈ US + 31.
Inputs explained
US Size
Standard American sizing.
Gender
Crucial distinction. A US Men's 7 is much larger than a US Women's 7.
Understanding your results
Sizes are approximate. Brands (like Nike vs Adidas) vary by up to half a size. Always measure your foot in cm for the best accuracy.
Example scenarios
Men's 10
US 10 -> UK 9 -> EU 43.
Women's 8
US 8 -> UK 6 -> EU 38.5.
Key Features
- Men & Women Support
- CM Length Estimate
- Major Region Conversion
Tips & Best Practices
- Measure your feet in the afternoon (feet swell during the day).
- If you are between sizes, always size up.
Glossary of Terms
- Brannock Device
- The metal measuring tool used in shoe stores.
- Mondopoint
- A sizing system based on foot length in millimeters (common in ski boots).