Free Men's Shoe Size Converter
Convert men's shoe sizes across US, UK, EU, Japan (cm), and China systems. Full size table from US 5 to US 15 with foot measurements. Free.
Exact Conversion Formula & Multipliers
Shoe sizing is based on foot length, most consistently expressed in the Mondopoint system as millimeters, but converted into different traditional scales: the Paris point (used in EU sizing) equals ⅔ of a centimeter, so an EU size is roughly (foot length in cm × 1.5) + a small constant offset. US and UK men's sizes both use a base unit of ⅓ inch (about 8.46 mm) per size increment but start counting from different baseline foot lengths, which is why a US size and UK size for the same physical shoe are offset by exactly one full size.
Practical Real-World Scenarios
- Buying shoes internationally: sneakers imported from Europe or Asia are labeled in EU sizes, requiring conversion to a familiar US or UK size before ordering online.
- Sports and specialty footwear: soccer boots and running shoes from European brands often only list EU and UK sizing on the box, even when sold in US retail stores.
- Foot-measurement-based fitting: shoe stores that measure foot length in centimeters or the Brannock device's inch scale need to convert that raw measurement into whichever brand's size system is in stock.
Historical & Technical Background
The Brannock Device, patented in 1927 and still standard in American shoe stores, measures foot length and width to determine US shoe size, itself based on a barleycorn-derived English sizing tradition dating to the 14th century where 1 shoe size equaled ⅓ inch (the length of a barleycorn) — the origin of the otherwise arbitrary-seeming ⅓ inch increment. The French Paris point system, using ⅔ cm increments, developed independently in continental Europe, and Mondopoint (direct millimeter length) was introduced by the ISO in the 1970s specifically to cut through the resulting international confusion, though it has never fully replaced the older national systems.
Precision & Accuracy Statement
Every conversion factor used on this page is checked against internationally recognized reference standards — ISO 19407 (Mondopoint) footwear-sizing standards — rather than approximated or rounded for display. Where a constant is fixed by international definition (such as 1 inch = 2.54 cm, or standard gravity = 9.80665 m/s²), we use the exact defined value. Where a figure is a practical industry convention rather than a physical constant, that distinction is stated explicitly above so results are never presented with false precision.
How This Converter Works
Men's shoe sizes differ significantly by region. A US 10 is a UK 9 and an EU 43. Japan uses foot length in centimetres, which is the most precise system. Use the lookup table to find your size in any country.
Common Conversions
| US | UK / AU | EU | JP (cm) | Foot (cm) |
|---|---|---|---|---|
| 6 | 5 | 38 | 24 cm | 22.9 cm |
| 7 | 6 | 40 | 25 cm | 23.8 cm |
| 8 | 7 | 41 | 26 cm | 24.8 cm |
| 9 | 8 | 42 | 27 cm | 25.7 cm |
| 10 | 9 | 43 | 28 cm | 26.7 cm |
| 11 | 10 | 44 | 29 cm | 27.6 cm |
| 12 | 11 | 45 | 30 cm | 28.6 cm |
| 13 | 12 | 46 | 31 cm | 29.5 cm |