Shoe Size Converter
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Shoe sizes use different scales in different countries. On a typical adult chart, a US men’s 9 is a UK 8.5, an EU 42.5 and fits a foot about 27 cm long. US women’s sizes run about 1.5 sizes larger than men’s for the same foot.
| Converted sizes (men's chart) | |
| US men's | 9 |
| US women's | 10.5 |
| UK | 8.5 |
| EU | 42.5 |
| Foot length | 27 cm (10.63 in) |
| Japan / Mondopoint | 270 mm |
| Nearest chart row | |
| US M 9 | UK 8.5 | EU 42.5 | 27 cm |
Show steps
- Find 9 in the men's chart column for US men's.
- US women's sizes are about 1.5 sizes larger than US men's for the same foot: men's 9 ≈ women's 10.5.
- Mondopoint (used for ski boots and in Japan) is the foot length in millimeters: about 270 mm.
How to use the shoe size converter
- Pick the size system you know and type the size.
- For UK, EU or cm, choose the men’s or women’s chart.
- Press Convert to see the size in every system. Half sizes are interpolated.
Men's shoe size chart
| US | UK | EU | Foot (cm) |
|---|---|---|---|
| 7 | 6.5 | 40 | 25 |
| 8 | 7.5 | 41 | 26 |
| 9 | 8.5 | 42.5 | 27 |
| 10 | 9.5 | 44 | 28 |
| 11 | 10.5 | 45 | 29 |
| 12 | 11.5 | 46 | 30 |
| 13 | 12.5 | 47.5 | 31 |
Women's shoe size chart
| US | UK | EU | Foot (cm) |
|---|---|---|---|
| 5 | 2.5 | 35.5 | 22 |
| 6 | 3.5 | 36.5 | 23 |
| 7 | 4.5 | 38 | 24 |
| 8 | 5.5 | 39 | 25 |
| 9 | 6.5 | 40.5 | 26 |
| 10 | 7.5 | 42 | 27 |
| 11 | 8.5 | 43 | 28 |
How to measure your foot
- Stand on a sheet of paper with your heel against a wall.
- Mark the tip of your longest toe and measure from the wall to the mark in centimeters.
- Measure both feet in the evening, when feet are largest, and use the longer one.
The math behind the scales: one US or UK size step is ⅓ inch (a barleycorn), about 8.5 mm, while one EU step is ⅔ cm (a Paris point), about 6.7 mm. That is why EU sizes go up faster.
Shoe size and unit conversion quiz: 10 questions
Test yourself with 10 multiple-choice questions. Choose an answer and press Submit to see if you are right and why. Your score appears at the end.
Quiz complete
Frequently asked questions
How do I convert US to EU shoe size?
For men, add about 33: US 9 is about EU 42.5. For women, add about 31: US 8 is about EU 39. Use the calculator for exact chart values.
What is the difference between men's and women's shoe sizes?
For the same foot, a US women's size is about 1.5 higher than a US men's size: a men's 8 is about a women's 9.5.
Why does my size differ between brands?
Each brand uses its own lasts (foot molds), so sizes can vary by half a size or more. Check the brand's chart when you can.
What is a UK shoe size compared with US?
For men, UK is about half a size smaller than US. For women, UK is about 2.5 sizes smaller than US women's.
Does this include kids' sizes?
No. Children's sizes use a separate scale; this converter covers adult sizes.
Sources
- ISO 9407: Shoe sizes, Mondopoint system of sizing and marking
- NIST: Units and conversions (inch to centimeter)
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