How to Convert Shoe Size Between US, UK, EU, JP — Free (2026)

Buying shoes from an international retailer or travelling abroad means navigating incompatible sizing systems. The free shoe size converter translates between US, UK, EU, and JP sizes for men, women, and children — pick your size and system, and all equivalents appear instantly.

How to Use the Tool

1. Select your sizing system: US Men, US Women, UK, EU, or JP (Japanese).
2. Enter or select your current shoe size in that system.
3. The tool displays the equivalent size in every other system. Use the result that matches the retailer or country you're buying from.

How It Works

Each sizing system measures foot length differently, which is why a direct subtraction or addition rule only works approximately. EU sizes are based on Paris points (⅔ cm), UK sizes use barleycorns (⅓ inch), US sizes use a different barleycorn scale with a separate offset for women, and Japanese sizes simply state foot length in millimetres (e.g. JP 28 = 280 mm foot length). Because these scales are offset rather than proportional, the conversions are table-based rather than formula-based.

A common reference point: a US Men's 10 converts to approximately UK 9, EU 44, and JP 28.

Use Cases

• International online shopping — confirming the right EU or JP size when ordering from a European or Japanese brand that does not publish US sizes.
• Travel — buying shoes while abroad without a conversion table in your pocket.
• Gift buying — converting a family member's US size to EU before ordering from a European retailer.
• Secondhand and vintage markets — older shoes are often labelled in UK sizes regardless of where they're sold.
• Retail staff — quickly finding a customer's equivalent size in imported stock labelled in a foreign system.

Frequently Asked Questions

What is EU size 42 in US?

EU 42 is approximately US Men's 9 or US Women's 10.5. Because US Men's and Women's scales are offset by roughly 1.5 sizes, the same EU number maps to different US sizes depending on the gender sizing of the shoe. Always check the gender-specific conversion when ordering from European brands.

Is UK shoe size the same as US?

No. UK men's sizes are approximately one size smaller than US men's sizes — a US Men's 10 is roughly a UK 9. For women, UK and US sizes differ by about two sizes: a US Women's 8 is approximately a UK 6. The scales use different zero points on the same barleycorn unit, which causes the consistent offset.

How do Japanese shoe sizes work?

Japanese shoe sizes (JIS S5037 standard) express the recommended foot length in centimetres, rounded to the nearest half centimetre. JP 27 means the shoe fits a foot that is 27 cm (270 mm) long. This makes JP sizing the most straightforward system — measure your foot length with a ruler, convert to centimetres, and that is your JP size. The tool converts JP sizes to and from all other systems using the standard foot-length lookup table.