Shoe Size Converter
Convert an adult shoe size between US men's, US women's, EU and UK systems. Approximate only; brands, lasts and widths vary.
Results
Size (EU)
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Educational estimates · not financial advice · free, no signup
Formula / how it works
Approximate size mapping between regional systems. Typical relationships: US men ≈ US women − 1.5; UK ≈ US men − 1; EU rises about one size per 2/3 cm. Brand sizing varies, so treat results as a guide.
Detailed guide
What it is, how to use it, how to read the numbers, common mistakes, a worked example, formulas, and FAQs.
What this calculator is
Shoe sizes are not standardised across the world. The United States, the United Kingdom and Europe use different scales with different starting points, and men's and women's sizes differ within the same country. This converter maps an adult size from one system to another so you can shop from an international site or read a size chart. The conversion is approximate. Manufacturers use different lasts, widths and rounding, so one brand's EU 42 may fit differently from another's. For the best fit, use the maker's own size chart or measure your foot length and compare it with the chart.
When to use / who it helps
- You are buying shoes from an overseas retailer.
- You are reading a review that uses a different size system.
- You are travelling and need a size in local terms.
- You are comparing men's and women's sizes.
- You are buying a gift in another country's size.
How to use
Steps
- Enter the size you know.
- Choose the system it comes from.
- Choose the system you want to convert to.
- Read the converted size.
- Check the brand's size chart for confirmation.
- Order a half size up or down if reviews say the brand runs small or large.
How to interpret results
- The result is an approximation, not a guarantee of fit.
- Women's and men's sizes differ by about one and a half sizes in the US system.
- EU sizes are usually whole or half numbers, and UK sizes run lower than US men's.
- Width and last shape are not captured.
- Children's sizes use different tables.
Common mistakes & gotchas
- Assuming the same size fits across all brands.
- Mixing up men's and women's US sizes.
- Ignoring foot width.
- Using adult conversions for children.
- Not checking the brand's own chart.
Worked example
Worked example — US men's 9 to EU
- Choose US Men as the starting system and enter size 9.
- Choose EU as the target system.
- The tool returns EU 42, which is the commonly listed equivalent.
- Check the brand chart; some brands list 9 as 42.5 or 43, so confirm before ordering.
Result: US men's 9 is approximately EU 42.
To load the form's own demo values, tap Try example above the Calculate button.
How to calculate / formula
Approximate size mapping between regional systems. Typical relationships: US men ≈ US women − 1.5; UK ≈ US men − 1; EU rises about one size per 2/3 cm. Brand sizing varies, so treat results as a guide.
Frequently asked questions
How do I convert US shoe size to EU?
Use a conversion table or this calculator. A US men's 9 is about EU 42.
Are men's and women's sizes the same?
No. US women's sizes are about 1.5 larger than men's for the same foot length.
Why does my size differ between brands?
Brands use different lasts and rounding, so charts differ.
What is the UK size equivalent of a US size?
UK men's is typically one size lower than US men's.
Should I measure my foot?
Yes. Measure length in centimetres and compare it with the brand's chart.
Does this include width?
No. Width systems vary by brand.