Official UK to US Shoe Size Converter
Accurately convert UK shoe sizes to US (American) sizes using our ISO-standard data charts.
Women's UK to US
Men's UK to US
Interactive Shoe Size Converter
Understanding UK vs US Shoe Sizing
Why Simple Formulas Are Misleading
Common rules of thumb, like "add 1 for men" or "add 2 for women," are oversimplifications. The actual difference can be 0.5, 1, 1.5, or 2 sizes depending on the manufacturer and where the sizes fall on the scale. These formulas don't account for the nuances of the underlying measurement systems (barleycorns for UK vs. a modified inch-based system for US).
The ISO Standard: A More Reliable Method
For accurate conversions, it's best to refer to charts based on the ISO/TS 19407:2015 international standard. This provides a consistent basis for comparison. Our charts are populated with this data, giving you a trustworthy conversion from UK to US sizes.
Complete UK to US Size Chart
Women's Sizes
| UK | US | EU | CM |
|---|---|---|---|
| 3 | 5 | 35 | 22 |
| 4 | 6 | 36.5 | 23 |
| 5 | 7 | 37.5 | 23.5 |
| 6 | 8 | 39 | 24.5 |
| 7 | 9 | 40 | 25.5 |
| 8 | 10 | 41.5 | 26.5 |
Men's Sizes
| UK | US | EU | CM |
|---|---|---|---|
| 6 | 7 | 39 | 24.5 |
| 7 | 8 | 40 | 25.5 |
| 8 | 9 | 41.5 | 26.5 |
| 9 | 10 | 42.5 | 27 |
| 10 | 11 | 44 | 28 |
| 11 | 12 | 45 | 28.5 |
Brand-Specific Notes
UK Brands (Clarks, Dr. Martens)
These brands usually adhere strictly to UK sizing. Your converted US size should be accurate for them.
US Brands (Nike, New Balance)
When buying US brands, it's always best to refer to their official US size, even if a UK size is listed. The conversion can sometimes vary slightly from the standard.
European Brands (Adidas, Puma)
These brands often list UK, US, and EU sizes. Be aware that their conversions might differ. For example, an Adidas UK 8 might not be the same as a Nike UK 8.
Frequently Asked Questions
What is a UK size 8 in US?
A UK size 8 is generally a US size 9 for men's shoes and a US size 10.5 for women's shoes. However, this can vary by brand, especially for trainers.
Is a UK 10 shoe size a US 11?
Yes, typically a men's UK size 10 is equivalent to a US size 11. It's always a good idea to check a brand-specific chart if you are buying performance footwear.
How do you convert UK shoe size to US?
The general rule is to add 1 to the UK size for men (e.g., UK 9 = US 10) and add 2 for women (e.g., UK 6 = US 8). For the most accurate conversion, use a chart or converter tool that accounts for brand variations.
Need to Compare Specific Brands?
Shoe sizes can differ between Nike, Adidas, and New Balance. For the most accurate fit, try our dedicated brand-specific converter.
Go to Multi-Brand Converter