A European 42
Input EU 42
Result UK 8, US men 9, US women 10, Japan 26.5 cm, Mondopoint 265 mm for a 26.5 cm foot.
Shoe Size Converter
Everyday LifeSwitch a shoe size between EU, UK, US men, US women, Japan centimetres and Mondopoint millimetres, all anchored on foot length.
Your inputs
Result
EU
—
- UK —
- US men —
- US women —
- Japan — cm
- Mondopoint — mm
- Foot length — cm
Change any input and the result updates instantly.
Formula and rules
- Foot length in centimetres is the common base, and every other system is derived from it.
- EU size = foot length × 1.5 + 2, following the Paris point of two thirds of a centimetre per size.
- UK size = foot length − 18.5, US men = UK + 1 and US women = UK + 2.
- Japan sizes the shoe in centimetres, so the JP figure equals the foot length.
- Mondopoint is the foot length in millimetres, so 26.5 cm becomes 265 mm.
Worked examples
A British 8
Input UK 8
Result The same foot length of 26.5 cm, which is EU 42, US men 9 and US women 10.
A measured foot
Input JP 26.5
Result EU 42, UK 8, US men 9, and 265 mm in Mondopoint terms.
FAQ
Why is a 26.5 cm foot an EU 42 but a UK 8?
The two scales start at different points. Europe counts in Paris points of two thirds of a centimetre and leaves roughly two sizes of room inside the shoe, while the British scale is close to one centimetre per size starting from a much smaller zero.
Do I need to add room for socks or insoles?
No. Shoe sizes already include a small allowance beyond the measured foot. If you wear thick socks or add an insole, go up half a size instead of changing the foot length.
Why do two brands disagree by half a size?
Last shape and toe box differ between brands, and running shoes are usually cut closer than hiking boots. Treat this converter as a starting point and check the brand chart for the final call.
Disclaimer: Results follow the formula shown on this page and are for reference only. Real-world quantities vary with materials, technique and conditions, so allow a margin before ordering.