Shoe Size Converter (UK, US, EU)
Convert adult shoe sizes between UK, US men's, US women's and EU, see your foot length in cm, and read the full size chart.
US men's
9
- UK
- 8
- US women's
- 10
- EU
- 42
- Foot length
- 26.7 cm (10.5 in)
- Mondopoint (Japan, China, ski boots)
- 265 mm
UK 8 is about US men's 9, US women's 10 and EU 42, for a foot about 26.7 cm long.
How it's worked out
- Shoe last length
UK = 3 × last (inches) − 2511 in - EU size
1.5 × 27.94 cm41.91 - US sizes
men's = UK + 1, women's = UK + 29 / 10
Adult shoe sizes
| UK | US men | US women | EU | Foot (cm) |
|---|---|---|---|---|
| 3 | 4 | 5 | 35.5 | 22.4 |
| 4 | 5 | 6 | 37 | 23.3 |
| 5 | 6 | 7 | 38 | 24.1 |
| 6 | 7 | 8 | 39.5 | 25 |
| 7 | 8 | 9 | 40.5 | 25.8 |
| 8 | 9 | 10 | 42 | 26.7 |
| 9 | 10 | 11 | 43 | 27.5 |
| 10 | 11 | 12 | 44.5 | 28.4 |
| 11 | 12 | 13 | 45.5 | 29.2 |
| 12 | 13 | 14 | 47 | 30.1 |
| 13 | 14 | 15 | 48.5 | 30.9 |
- Brands cut differently, so treat this as a starting point and check the brand's own chart. Measure your foot in the evening, heel to longest toe, standing up.
How sizes are worked out
UK = 3 × last length (in) − 25 · EU = 1.5 × last length (cm) · US men's = UK + 1 · US women's = UK + 2
The last is the form a shoe is built on, about half an inch longer than the foot.
Example
UK 8 is US men's 9, US women's 10 and EU 42; EU 42 converts back to UK 8.
This covers adult sizes. Children's sizes use a different starting point.
Questions people ask
What is UK 8 in US and EU sizes?
About US men's 9, US women's 10 and EU 42, for a foot about 26.7 cm long.
What size system does Pakistan use?
Shops in Pakistan and India mostly use UK sizes, with EU sizes on many imported and sports brands.
Why does my size differ between brands?
Each brand uses its own shoe lasts, so sizes can vary by half a size or more. Check the brand's chart, or go by foot length.
How do I measure my foot?
Stand on paper in the evening, mark your heel and longest toe, and measure the distance in cm. Use the bigger foot.
About this calculator
Formula and rules last checked 25 October 2026Written and tested by the CalculatorDex teamReport a problem