US sizes to UK sizes
Type a value in US to get it in UK instantly.
That's 1.64× as big as a basketball player’s foot — nothing on our list beats it. That fits a foot about 54.19 cm long.
Convert the other way: UK to US
What it means
How long is that foot?
Sizing is a convention, not a standard: brands differ by half a size or more. Measure your foot in centimeters and treat these as a starting point.
The math
How to convert US to UK
Each system counts differently: EU = (foot cm + 1.5) × 1.5, and US men = foot inches × 3 − 22. UK is one size below US for men, two for women.
Example: 42 US = 41 UK.
The table below uses Men’s. Switch above and the US and UK columns shift.
Every unit
Your size in every system
Tables
US to UK conversion table
| US | UK |
|---|---|
| 35 US | 34 UK |
| 36 US | 35 UK |
| 37 US | 36 UK |
| 38 US | 37 UK |
| 39 US | 38 UK |
| 40 US | 39 UK |
| 41 US | 40 UK |
| 42 US | 41 UK |
| 43 US | 42 UK |
| 44 US | 43 UK |
| 45 US | 44 UK |
| 46 US | 45 UK |
| 47 US | 46 UK |
| 48 US | 47 UK |
UK to US conversion table
| UK | US |
|---|---|
| 35 UK | 36 US |
| 36 UK | 37 US |
| 37 UK | 38 US |
| 38 UK | 39 US |
| 39 UK | 40 US |
| 40 UK | 41 US |
| 41 UK | 42 US |
| 42 UK | 43 US |
| 43 UK | 44 US |
| 44 UK | 45 US |
| 45 UK | 46 US |
| 46 UK | 47 US |
| 47 UK | 48 US |
| 48 UK | 49 US |
Quick answers
Quick answers
- How many UK is 10 US?
- 10 US is 9 UK.
- How many UK is 42 US?
- 42 US is 41 UK.
The units
About these units
US sizes (US)
American sizing, counted in barleycorns. Women’s numbers run 1.5 above men’s for the same foot.
UK sizes (UK)
British sizing, one size below US for men and two below for women.
Keep going