Shoe Size Converter
Convert shoe sizes between US, UK, EU and Japan for men, women and kids, from a size or foot length. Free, no sign-up, and it runs in your browser.
Dedicated page: /en/shoe-size-converter
Estimate only, not a guarantee of fit. Shoe sizing is not standardised between brands: the same nominal size can vary by a third of a size or more between makers, so always check the brand's own chart for the shoe you are buying.
Half sizes work: 9 or 9.5. For foot length, measure heel to longest toe, standing, in the afternoon.
Width letters differ by brand. If the shoe you want only comes in standard width, size up half a size for a wide foot.
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Quick answer
A shoe size converter turns a shoe size from one national sizing system into the matching size in another. A US men's 9 is a US women's 10.5, a UK 8, an EU 42.5 and a Japanese 27, made for a 26.2 cm foot.
About this Shoe Size Converter
Convert shoe sizes between US, UK, EU and Japan for men, women and kids, from a size or foot length. It is one of the Health and Family on ToolUstad, and like every tool here it runs entirely in your browser: nothing you type, paste or open is uploaded to a server, and there is no sign-up or usage limit.
What is a shoe size converter?
A shoe size converter turns a shoe size from one national sizing system into the matching size in another. It exists because no single numbering system is used worldwide, so the same physical shoe carries a different number in each country. The converter covers the five systems used most often in retail: US men's, US women's, UK, EU, and Japan, where the size is the foot length in centimetres. Enter a size in any one of them, or your foot length, and it shows the same size in all five, with the foot length the size is made for.
The example on the page is the one most people need. The chart behind the converter is Nike's published men's footwear chart, which lists the five systems against foot length in sixteenths of an inch. Each row of the table is a single chart row, so the converter finds your size on its row and prints the rest of the row.
How the sizing systems differ
US and UK sizes count barleycorns, an old English unit of one third of an inch, along the last, the mould the shoe is built on. US men's sizes sit one size above UK: a US men's 9 is a UK 8. US women's sizes sit one and a half above men's: a US men's 9 is a US women's 10.5. The formula behind the US scale is US men equals 3 times the foot length in inches minus 22. European sizes are Paris points, each two thirds of a centimetre, and the EU size is 1.5 times the last length in centimetres.
Foot length mode and kids
If you do not know your size in any system, measure your foot and let the converter find the nearest chart row. Stand on a sheet of paper with your heel against a wall, mark the end of your longest toe, and measure heel to mark. Use the longer foot, measure in the afternoon when feet are at their largest, and wear the socks you will wear with the shoes. Add 0.5 to 1 cm of wiggle room for closed-toe shoes.
Best practices
- Measure both feet and use the longer one: most people have one foot half a size bigger than the other.
- Buy from shops that accept returns: shoes often run half a size apart between brands, even in the same nominal size.
Common mistakes to avoid
- Using a fixed offset for EU sizes: EU sizes are Paris points on the last, not the foot, so no single formula works.
- Using the cm size on the box as your foot length: the shoe is longer than the foot, so the box number overstates it.
Who is the shoe size converter for?
Anyone buying shoes online from another country, anyone switching between men's and women's sizing, parents buying kids' shoes, and anyone who knows their foot length but not their size in a foreign system.
Related terms: US to EU shoe size, UK to US shoe size, shoe size chart, men's shoe size conversion, women's shoe size conversion, kids shoe size chart, Japan shoe size cm, foot length to shoe size.
Estimate only, not a guarantee of fit. Shoe sizing is not standardised between brands, so check the brand's own chart for the shoe you are buying.
Learn: how to use the Shoe Size Converter
- Pick men, women or kids, then pick the system your size is in.
- Type the size, or your foot length in centimetres or inches.
- Read the same size in every system, with the foot length it is made for.
Features
- US men, US women, UK, EU and Japan sizes in one view
- Convert from a size or from your foot length
- Full men's chart from Nike, US 3.5 to 16
- Kids chart, US 10.5C to 7Y
- Width guide: narrow, standard, wide and extra wide
- Printable foot measure instructions
- Brand-variation warning with the Nike chart quirks noted
Worked example
You wear a US men's 9 and are buying shoes listed in UK sizes. On the chart, men's 9 is women's 10.5, UK 8, EU 42.5, and Japan 27 cm. The foot length for the size is 26.2 cm, or 10 and 5 sixteenths of an inch. Check: 3 times 10.3125 minus 22 is 8.94, which is size 9 within 0.06.
Frequently asked questions
How do I convert US shoe size to EU?
On Nike's chart a US men's 9 is EU 42.5 and a US men's 10 is EU 44. There is no single formula, because EU sizes are based on the length of the shoe last in Paris points, but each half US size adds about half to one EU size.
How do I convert men's to women's shoe sizes?
Add 1.5 to the men's size to get the women's size on Nike's chart: men's 9 is women's 10.5. Other brands may use plus 1 or plus 1.5. A unisex shoe is often labelled in men's sizes, so women should add 1.5.
Why do UK and US sizes differ?
The UK scale starts at a different point from the US scale. For adult men's sizes the UK number is one lower than the US men's number, so US men's 8 is UK 7.
Is the cm size on a shoe box my foot length?
Not exactly. The cm size describes the shoe, not the foot, and it differs from foot length because the shoe's last is longer than the foot.
Do shoes from different brands fit the same?
No. Conversions give an equivalent size, but each brand has its own last, and the same nominal size can vary by a third of a size or more between makers. Check the brand's own chart for the same shoe, and buy from shops that accept returns.
How do I measure my foot for shoe size?
Stand on a sheet of paper with your heel against a wall. Mark the end of your longest toe, measure heel to mark, and use the longer foot. Measure in the afternoon, when feet are at their largest, wearing the socks you will wear with the shoes.
What do shoe width letters mean?
D is standard for men and B for women in the US. Wide fits are 2E for men and D for women, and extra wide is 4E for men and 2E for women.
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