Nike Shoe Size Converter US UK EU CM

How to use this calculator

Choose men's or women's sizing.
Pick the system you know: US, UK, EU or foot length in cm.
Type your size or foot length.
Read the converted sizes and your estimated foot length.
Check the product size chart and reviews, then add the pair to your cart.

How to find your Nike shoe size when shopping online

Shoe sizes change from country to country, and from brand to brand. A US 9 can be a UK 8 and an EU 42 or 43 depending on the maker. When you buy online, a wrong size means a return, a delay and sometimes a missed sale price.

This converter turns your size into foot length and back into every system, so you can compare charts quickly. Nike models can fit differently, so read the notes on each product page. Treat the result as a starting point and check the brand's own chart on the product page.

Looking for deals? See the Nike page for promo codes, and read the Nike vs Adidas guide before you choose.

How the shoe size conversion works

Every size is converted through foot length. We estimate foot length from the size you enter, then calculate the matching US, UK and EU sizes.
Men's and women's US sizes differ by about one and a half sizes, so pick the right option for your fit.
EU sizes use the Paris point system. Brands can round differently, so results are approximate and shown to the nearest half size.
Always check the size chart on the product page, because models, widths and materials fit differently.

Tips to save more

Measure your foot in the evening and use the longer foot.
Check reviews for notes like "runs small" or "runs narrow".
Buy the same model and size you already own when you can.
Confirm the return policy before ordering on sale.

Frequently asked questions

How do I convert US shoe size to UK and EU?

As a rule of thumb, UK is about one size below men's US and two below women's US. EU is roughly 33 to 34 plus the US size for men. Use the converter for a more consistent answer through foot length.

How do I measure my foot length in cm?

Stand on paper, mark the longest toe and the heel, and measure the distance. Measure in the evening, when feet are slightly larger, and check both feet.

Should I size up or down?

If you are between sizes, size up for sneakers and running shoes, which need toe room. For sandals and slip-ons, the half size down can fit better. Always read the product reviews and size chart.

Why do brands fit differently?

Each brand uses its own lasts and rounding, and some models run narrow or wide. Treat any converter as a guide and confirm on the product page.

Can I return shoes bought online if they do not fit?

Return rules depend on the platform and seller, so check the policy before you buy, especially on sale items.

Helpful guides and deals

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nike promo codes and deals

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This calculator gives estimates for planning only. It is not financial, tax or legal advice. Confirm exact figures with your employer, bank, lender or the relevant government agency.