About Shoe Size Conversion
Shopping for shoes internationally can be confusing. A US size 9 is not the same as a UK size 9 or an EU size 42. Our shoe size conversion tool above helps you instantly translate between the four most common sizing systems: US, UK, European (EU), and centimeter (CM) foot length. Whether you're buying sneakers from the United States, boots from the United Kingdom, or sandals from Europe, this international shoe size converter ensures you get the right fit every time.
Understanding Different Shoe Sizing Systems
There are three major shoe sizing systems used worldwide:
- US Sizes – Used primarily in the United States and Canada. Men's and women's scales differ by approximately 1.5 sizes (a women's 8.5 is roughly a men's 7).
- UK Sizes – Used in the United Kingdom, Australia, and New Zealand. UK sizes are typically 1 size smaller than US men's and 2 sizes smaller than US women's.
- EU Sizes – Used across continental Europe. Based on the Paris point system where each size increment equals 6.67 mm (⅔ cm) of foot length. EU sizes are unisex and do not differentiate between men and women.
- CM (Mondopoint) – The most precise system, measuring actual foot length in centimeters. Widely used in Japan and by athletic brands like Nike and Adidas for size charts.
How to Use This Shoe Size Converter
Using our shoe size calculator is simple:
- Step 1: Select your gender category – Men's, Women's, or Kids'.
- Step 2: Enter your known shoe size in any of the four fields (US, UK, EU, or CM).
- Step 3: All other fields will automatically update with the converted sizes.
- Step 4: Click "View Quick Reference Size Chart" to see common size equivalents at a glance.
The tool works in real time — just type in any field and watch the conversions appear instantly. You can also use the quick reference chart to compare sizes without manual input.
Shoe Size Conversion Tips for Accurate Fitting
- Measure your foot in the evening – Feet swell throughout the day, so measuring in the afternoon or evening gives a more accurate size.
- Use CM for precision – If you know your exact foot length in centimeters, enter it directly into the CM field for the most accurate conversion across all systems.
- Brand sizing varies – This tool provides standard conversions. Individual brands (especially Nike, Adidas, Dr. Martens, and Birkenstock) may have slight variations — always check the brand's specific size chart.
- Half sizes matter – Our converter supports half sizes (e.g., 8.5, 9.5). If you're between sizes, it's usually best to size up for comfort.
- Width is not included – This tool converts length-based sizes only. Shoe width (narrow, medium, wide) is a separate measurement.
Frequently Asked Questions
What is a US size 8 in UK and EU?
For men's, a US 8 equals approximately UK 7 and EU 41. For women's, a US 8 equals approximately UK 6 and EU 39. Use the tool above for precise conversions including half sizes.
How do I convert EU shoe sizes to US?
For men's shoes, subtract 33 from the EU size to get the approximate US size (EU 42 ≈ US 9). For women's, subtract 31 (EU 39 ≈ US 8). Enter your EU size in the converter above for an instant, accurate result.
Are EU shoe sizes unisex?
Yes, European shoe sizes are unisex. A EU 42 is the same length whether it's a men's or women's shoe. However, the width and overall fit may differ between men's and women's styles.
What is the most accurate way to measure shoe size?
The most accurate method is to measure your foot length in centimeters (CM) by tracing your foot on paper and measuring the distance from heel to longest toe. Enter this measurement into the CM field of our converter to get precise US, UK, and EU sizes.
