US to UK Shoe Size Conversion
The standard rule is simple: Men's US = UK + 1.0 and Women's US = UK + 2.0. But major brands like Adidas and Nike break this rule. Use our calculator and cheat sheet below to be sure.
Size Converter
Half sizes are rounded to the nearest 0.5
Converted Sizes
Reference Table
| US | EU | UK | CM | AU (UK) | JP (CM) | CN (CM) | MX (CM) | BR |
|---|---|---|---|---|---|---|---|---|
| 4 | 36.5 | 3.5 | 22 | 3.5 | 22 | 220 | 22 | 35 |
| 4.5 | 37 | 4 | 22.5 | 4 | 22.5 | 225 | 22.5 | 35.5 |
| 5 | 37.5 | 4.5 | 23 | 4.5 | 23 | 230 | 23 | 36 |
| 5.5 | 38 | 5 | 23.5 | 5 | 23.5 | 235 | 23.5 | 36.5 |
| 6 | 39 | 5.5 | 24 | 5.5 | 24 | 240 | 24 | 37 |
| 6.5 | 39.5 | 6 | 24.5 | 6 | 24.5 | 245 | 24.5 | 38 |
| 7 | 40 | 6.5 | 25 | 6.5 | 25 | 250 | 25 | 39 |
| 7.5 | 40.5 | 7 | 25.5 | 7 | 25.5 | 255 | 25.5 | 39.5 |
| 8 | 41 | 7.5 | 26 | 7.5 | 26 | 260 | 26 | 40 |
| 8.5 | 42 | 8 | 26.5 | 8 | 26.5 | 265 | 26.5 | 40.5 |
| 9 | 42.5 | 8.5 | 27 | 8.5 | 27 | 270 | 27 | 41 |
| 9.5 | 43 | 9 | 27.5 | 9 | 27.5 | 275 | 27.5 | 41.5 |
| 10 | 44 | 9.5 | 28 | 9.5 | 28 | 280 | 28 | 42 |
| 10.5 | 44.5 | 10 | 28.5 | 10 | 28.5 | 285 | 28.5 | 42.5 |
| 11 | 45 | 10.5 | 29 | 10.5 | 29 | 290 | 29 | 43 |
| 11.5 | 45.5 | 11 | 29.5 | 11 | 29.5 | 295 | 29.5 | 43.5 |
| 12 | 46 | 11.5 | 30 | 11.5 | 30 | 300 | 30 | 44 |
| 13 | 47.5 | 12.5 | 31 | 12.5 | 31 | 310 | 31 | 45 |
| 14 | 48.5 | 13.5 | 32 | 13.5 | 32 | 320 | 32 | 46 |
| 15 | 49.5 | 14.5 | 33 | 14.5 | 33 | 330 | 33 | 47 |
Frequently Asked Questions
🦶 How to Measure Your Feet
1. Trace Your Foot
The most accurate method for home measurement:
- Place a piece of paper on the floor against a wall.
- Stand on the paper with your heel against the wall.
- Hold a pen vertically (90°) and trace your foot outline.
2. Measure Length & Width
- Use a ruler to measure the length from the heel line to your longest toe mark.
- Measure the width at the widest part of your foot trace.
- Pro Tip: Subtract 0.2 inches (5mm) from length to account for the pencil width.
👟 Fit Check: The Thumb Test
Is it the right size?
- There should be about a thumb's width of space between your longest toe and the end of the shoe.
- The heel should fit snugly without slipping.
- The widest part of your foot should align with the widest part of the shoe.
More Shoe Size Tools
Explore related conversion tools to find exactly what you need
Shoe Size Converter
Full conversion tool for all regions
US to EU Shoe Size
Convert US shoe sizes to EU
US to CM Shoe Size
Convert US shoe sizes to CM/JP
EU to UK Shoe Size
Convert EU shoe sizes to UK
CM to UK Shoe Size
Convert CM/JP shoe sizes to UK
Men's to Women's Shoe Size
Convert between men's and women's sizes
Women's to Men's Shoe Size
Convert between women's and men's sizes
Shoe Brand Size Chart
Brand-specific sizing for Nike, Adidas, and more
The US vs UK Sizing Guide
🇬🇧 The "Minus One" Rule (Men)
For most dress shoes and boots, simply subtract 1 size from your US size.
🇬🇧 The "Minus Two" Rule (Women)
Standard women's sizing subtracts 2 sizes.
⚠️ The Brand Anomalies Table
This is where 90% of returns happen. Adidas and Nike do NOT follow the standard rules above.
| Brand | Men's Offset | Women's Offset | Example (US 10 Men) |
|---|---|---|---|
| Standard / Generic | -1.0 Size | -2.0 Sizes | UK 9 |
| Adidas / New Balance | -0.5 Size | -1.5 Sizes | UK 9.5 |
| Nike / Jordan | -1.0 Size | -2.5 Sizes | UK 9 |
| Clarks | -1.0 Size | -2.5 Sizes | UK 9 |
Why is it so confusing?
The confusion stems from the base measurement. UK sizing is based on the length of the "last" (the foot mold) measured in Barleycorns (1/3 inch), starting from a different zero point than the US system. Brands like Adidas scale their US sizing differently to try and align with EU sizing (FR 42 etc.), creating the infamous "half-size gap".