FreeToolStation

Shoe Size Converter

UK, US, EU and centimetre sizes, converted.

Unit Converters Free, no sign-up Runs in your browser
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UK
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US
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EU
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Foot length
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In inches
UKUSEUFoot length
Shoe sizing is not standardised. Two pairs marked the same size from different brands can differ by a full size, and sports brands run noticeably different from formal shoes. Foot length in centimetres is the only measurement that means the same thing everywhere, which is why it is worth knowing yours.

About the Shoe Size Converter

Shoe Size Converter moves a size between the UK, US and European systems, and gives the foot length in centimetres that goes with it. Separate charts are used for men, women and children, because the three scales are offset from each other: a UK 8 in men's is not a UK 8 in women's, and the US scale differs from the UK one by one size for men and roughly two and a half for women.

The centimetre figure is the one worth paying attention to. UK and US sizes derive from the barleycorn, a third of an inch, which is why they go up in halves and why the steps are so coarse. European sizes use the Paris point, two thirds of a centimetre, which gives a slightly finer scale that does not line up neatly with the other two. Foot length in centimetres is the only measurement that means the same thing in every country.

None of it is standardised. Two pairs marked the same size from different brands can differ by a full size, sports shoes typically run smaller than formal ones, and the same brand can be inconsistent between models. Treat the chart as a starting point: measure your foot, stand up while you do it, measure late in the day when feet are at their largest, and buy to the longer foot if the two differ.

The page shows its working, not just its answer. Where there is a formula it is printed with your own numbers substituted in, so you can check the result rather than take it on trust -- which is the difference between a calculator you can use for something that matters and one you cannot.

Everything runs inside your browser. What you type is never uploaded, never logged and never stored, and the calculator keeps working if your connection drops after the page has loaded.

How to use the Shoe Size Converter

  1. Choose sizes for and size systemThe fields below change to match what you pick, so only the figures that matter to your case are asked for.
  2. Enter sizeDecimals are fine, and thousands separators are accepted and ignored.
  3. Read the uk, us and euThe figures update as you type. The Calculate button is there if you would rather press something, but nothing waits for it.
  4. Copy or check the resultCopy the summary with the copy button, or open the table to check it row by row.

Features

  • Shows uk, us, eu, foot length and in inches together, so you are not running it twice
  • A results table you can read across
  • Updates as you type, with no button to press and no page reload
  • Copy the result in one click
  • Free, no sign-up, and it runs entirely in your browser

Who uses this tool

The shoe size converter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

  • Converting a size before ordering from another country
  • Finding the EU size for a UK or US one
  • Working out a size from a measured foot length
  • Checking a child's size as they grow

Frequently asked questions

What is a UK 8 in US sizes?

For men's shoes, a US 8.5. For women's the offset is different, which is why the chart is split by who the shoes are for.

How do I measure my foot?

Stand on a sheet of paper, mark the back of the heel and the longest toe, and measure between them. Do it late in the day, and use the longer foot.

Why do sizes differ between brands?

Because nothing requires them to agree. Each brand uses its own lasts, so a full size of variation between brands is normal.

Are EU sizes the same everywhere in Europe?

Broadly, yes. The EU scale uses the Paris point and is more consistent than the UK and US scales, though individual brands still vary.

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Checked and rebuilt on 2026-10-14. The method this calculator uses is described in the section above, and corrections go through the contact page.