Shoe Size Converter
Turn any shoe size into another system — EU, UK, US (Men), US (Women), or foot length in centimetres — using the documented foot-length method.
One shared base
Every system is converted through a single base — the length of your foot in centimetres — so any pair lines up with one consistent rule.
Approximate fit
Sizing varies by brand, width, and last shape — treat the result as a starting point, not an exact fit.
What is a shoe size converter?
One size, any system
A shoe size converter changes a size from one regional system into another — EU to US, UK to EU, US Men's to US Women's, and so on. It works by translating every size through a single shared base, the length of your foot in centimetres, so any pair of systems can be converted with one consistent rule. This tool covers the systems you meet when shopping across borders: EU (the continental Paris-point scale), UK, US (Men) and US (Women), plus the raw foot length in centimetres that they are all built from. It is handy for online shopping from international stores, comparing a brand's chart to your usual size, or working out what your measured foot length means in each system.
Each system numbers sizes differently, but they all describe the same thing: how long the shoe's last is. The converter turns your size back into a foot length in centimetres (assuming the last runs about 1.5 cm longer than the foot), then forwards into the system you want.
EU = 1.5 × (foot cm + 1.5)EU sizes step in Paris points (2⁄3 cm); UK and US sizes step in barleycorns (1⁄3 inch), with US Men = UK + 1 and US Women = UK + 3. Because every direction pivots through the foot length in centimetres, one pair of rules handles any conversion — including EU straight to US.
Suppose you want to convert a EU 42 into a US Men's size.
Find the foot length
Reverse the EU rule: 42 ÷ 1.5 = 28 cm last, minus 1.5 cm ease = 26.5 cm foot.Find the UK size
Apply the barleycorn rule: 3 × (28 ÷ 2.54) − 25 ≈ 8.07 UK.Read the US size
US Men = UK + 1 ≈ 9.07, so a EU 42 is about a US Men's 9.
The result is an approximate equivalent, not an exact fit. The systems agree on the underlying foot length but each brand cuts its shoes around its own last, so a EU 42 from one maker can feel a half-size off from another. For the most reliable answer, measure your foot in centimetres and convert from that — it removes the guesswork of which size you "usually" take. When two sizes sit close together, size up rather than down, and remember that width matters as much as length for comfort. Use the converted number as the size to try on or the row to find in a brand's own size chart.
The arithmetic follows the documented standard; the limits are practical.
Conversions are approximate
These conversions use the standard documented relationships between systems, but real-world fit depends on the brand's last and the shoe's width, neither of which a formula can capture — so the same converted size can fit differently across makers. The tool also does not model children's scales, half-size rounding conventions, or vanity sizing. To be sure of the fit, measure your foot length in centimetres, convert from that, and check the maker's own size chart before buying.