Shoe Size Converter
This shoe size converter turns any size into US, UK, EU, and centimeters at once, so ordering from an overseas brand doesn't have to be guesswork. Pick mens, womens, or kids sizing, choose the system you already know, and you'll see the matching size in every other one, along with the foot length in centimeters. It's built from standard conversion charts, and since brands vary, the cm foot length is your most reliable guide.
- US, UK, EU, cm
- Mens, womens, kids
- Convert any way
- Foot length
- Full chart
Last updated June 18, 2026 Method: standard US, UK, EU charts Reviewed by the Calcowa team
Charts are a guide. Brands vary, so the cm foot length is the most reliable match.
Enter a size in range to see the conversions.
Men's US 9 = UK 8.5 = EU 42.5 = 27.0 cm foot length
How do shoe size systems compare?
The three big systems measure the same foot in different ways. US and UK sizes step in barleycorns, a third of an inch each, but they start from different baselines, so a men's US 9 is a UK 8.5 and an EU 42.5. The EU system counts Paris points, two thirds of a centimeter, which is why those numbers look so much larger.
Because each maker cuts its shoes a little differently, the surest anchor is your actual foot length in centimeters. Measure heel to longest toe, match it to the chart, and you've got a size that travels across brands and countries. That's why this converter shows the cm length right alongside every size number.
How to find your size in another system
Here's the quick routine, whether you're shopping abroad or just curious:
- 1
Pick the categoryChoose mens, womens, or kids, since the scales differ between them.
- 2
Enter what you knowType your size and tell the tool whether it is US, UK, EU, or cm.
- 3
Read every systemThe converter shows the matching size in all the others at once.
- 4
Check the cm lengthIf you're between sizes, the foot length in cm is the tiebreaker.
- 5
Confirm with the brandGlance at the brand's own chart too, since fit varies by maker.
How to measure your foot at home
Put a sheet of paper on the floor against a wall, stand with your heel touching the wall, and mark where your longest toe ends. Measure that distance in centimeters, and that's the number to match against the chart. Do it in the late afternoon, when feet swell to their largest, and measure both feet, since most people have one slightly longer. Use the bigger foot. If you'll wear thick socks, add a couple of millimeters. The Length Converter turns inches into centimeters if your ruler is imperial, and the Temperature Converter is handy for the rest of your overseas shopping.
Men's shoe size chart
A standard men's conversion chart across US, UK, EU, and foot length. Switch the tool to womens or kids above for those scales, and remember the cm column is the steadiest guide.
| US | UK | EU | Foot (cm) |
|---|---|---|---|
| 7 | 6 | 40 | 25.0 |
| 8 | 7 | 41 | 25.8 |
| 9 | 8.5 | 42.5 | 27.0 |
| 10 | 9.5 | 44 | 27.9 |
| 11 | 10.5 | 45 | 28.6 |
| 12 | 11.5 | 46.5 | 29.4 |
Frequently asked questions
Should I size up or down between systems?
Convert to the nearest size first, then lean on fit. If your converted size falls between two numbers, sizing up is usually safer than squeezing into the smaller one, especially for athletic shoes worn with thicker socks. For dress shoes that stretch a little, the exact converted size often works. When in doubt, the foot-length chart is the most reliable guide.
Each region scales sizing differently. US and UK sizes both use a barleycorn step of one third of an inch, but they start from different points, so a US men's size is about half a size larger than the UK number. Europe uses Paris points, roughly two thirds of a centimeter, which makes EU numbers look much bigger. This converter lines them all up for you.
For men, a US size runs about 0.5 larger than the UK size, so a US 9 is a UK 8.5. For women the gap is bigger, around 2 to 2.5 sizes, so a US women's 8 is roughly a UK 6. They share the same step size; they just start counting from a different zero point. Always check the system before you order.
Stand on a sheet of paper with your heel against a wall, then mark the tip of your longest toe and measure the distance in centimeters. Do it late in the day, when your feet are at their largest, and measure both feet since they often differ. Use the longer foot, and match the length to the chart to find your size.
Divide the gap roughly: an EU men's size is about the US size plus 33, so EU 42 is near a US 9. For women, EU is about the US size plus 30.5, so EU 39 is near a US 8.5. These are close guides, but brands vary, so use the converter and the foot-length chart together for the best fit.
No. A given foot length maps to a different number on the men's and women's scales, with women's US sizes running about 1.5 larger than men's for the same foot. That's why this tool asks whether you want men's, women's, or kids' sizing before it converts. Pick the right mode and the numbers will line up with the shoe you're buying.
Sizing charts are a guide, not a guarantee. Each brand uses its own lasts, the molds that shape a shoe, so the same labeled size can fit differently from one maker to the next. Athletic, dress, and boot styles also run differently. Treat the converted size as a starting point, then check the brand's own chart and reviews.
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