US to EU Shoe Size Conversion
US men's size 9 equals EU 42 on the Paris-point formula (foot length in cm × 1.5, rounded). EU sizes always round to whole numbers — there is no exact half-size equivalent, so treat EU as an approximation. For brand-specific fit (Nike runs small, New Balance runs large), use our brand guides below.
Try the conversion
| Foot length (mm) | US Men | US Women | UK | EU | CM |
|---|---|---|---|---|---|
| 237 | 6 | 7.5 | 5 | 36 | 23.5 |
| 246 | 7 | 8.5 | 6 | 37 | 24.5 |
| 254 | 8 | 9.5 | 7 | 38 | 25.5 |
| 262 | 9 | 10.5 | 8 | 39 | 26 |
| 271 | 10 | 11.5 | 9 | 41 | 27 |
| 279 | 11 | 12.5 | 10 | 42 | 28 |
| 288 | 12 | 13.5 | 11 | 43 | 29 |
| 296 | 13 | 14.5 | 12 | 44 | 29.5 |
Quick conversion table
| US Men | EU | Foot (mm) |
|---|---|---|
| 6 | 36 | 237 |
| 7 | 37 | 246 |
| 8 | 38 | 254 |
| 9 | 39 | 262 |
| 10 | 41 | 271 |
| 11 | 42 | 279 |
| 12 | 43 | 288 |
| 13 | 44 | 296 |
Formula (Layer A): EU = round(foot_length_cm × 1.5) where foot_length_cm = ((US + 22) / 3) × 2.54 / 10. See how we calculate for the full methodology.
How to read this conversion
The anchor row converts US Men 9 to 262mm first, then displays it as EU 39. That millimetre anchor is why the same size can be compared against brand and model fit without re-entering the number.
- Foot length in millimetres is the pivot; brand fit is applied later on brand and model pages.
- US men's labels use the barleycorn formula, then round to the nearest half size.
- EU labels are rounded to whole Paris-point sizes, so half-size precision is lost after conversion.
Save this conversion as your size passport
Save your foot length once, then compare brand and model sizing without retyping it.
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What is a US size 9 in EU?
US men's 9 equals EU 42 on the Paris-point formula (foot length ≈ 27 cm × 1.5, rounded). EU always rounds to whole sizes — treat it as the closest match, not an exact half-size.
Is US shoe size the same as EU?
No. US uses barleycorn length with a −22 offset; EU uses foot length in cm × 1.5. The same foot is labelled differently — always convert through foot length in millimetres.
Brand-specific sizing (Layer B)
Generic charts ignore fit — Nike runs small, New Balance runs large, Converse runs very small. For a purchase-ready answer with confidence score and sources:
Compare brand fit before buying
Length conversion gets you the starting size. Brand fit can still move the label by a half size.
Reverse conversion
Need the other direction? Use EU to US Shoe Size Conversion.