Why use this calculator
Shoe sizing varies significantly between countries and brands. This converter helps you find equivalent sizes across US, UK, and European systems so you can shop internationally with confidence.
How to use it
Enter your known shoe size and select which sizing system it belongs to. The calculator converts it to all other major systems and estimates foot length in centimeters.
The formula
US Women's = US Men's + 1.5; UK = US Men's - 0.5; EU = US Men's + 33.5; Foot Length (cm) = US Men's x 0.847 + 18.46
Worked examples
US Men's size 10
US Women's 11.5, UK 9.5, EU 43.5, ~27.0 cm
EU size 42
US Men's 8.5, US Women's 10, UK 8, ~25.7 cm
When people use it
- Shopping for shoes from international retailers
- Converting between men's and women's sizes
- Finding the right size for online purchases
- Comparing sizes across different brands
Tips
- Sizes can vary by brand, so use these conversions as a starting point.
- Half sizes are common in US and UK systems but less so in EU sizing.
- Measure your foot in the afternoon when feet are slightly larger.
- When in doubt, size up rather than down for comfort.
Questions people ask
- Are shoe size conversions exact?
- Conversions are approximate. Sizing varies between manufacturers, so always check brand-specific size charts when available.
- What is the difference between US Men's and Women's?
- US Women's sizes are typically 1.5 sizes larger than the equivalent Men's size. For example, a Men's 9 is equivalent to a Women's 10.5.
- How do I measure my foot?
- Stand on a piece of paper, trace your foot, and measure the longest distance from heel to toe. Compare the measurement in centimeters to a size chart.