Free Online Calculators
EU ↔ US Men/Women ↔ UK ↔ cm/inch
This shoe size calculator instantly converts your size between EU, US (men's & women's), UK, and measurements in centimetres or inches. It works by mapping foot length in millimetres to each regional sizing standard. No more guessing when shopping for shoes from another country.
Buying shoes across borders has never been straightforward. A European size 40 is not the same as a US size 8, and the UK scale adds yet another layer of confusion. Whether you are shopping on an American website, ordering from a British retailer, or simply trying to understand a Japanese sizing chart, our Shoe Size Calculator has you covered. It converts between EU, US Men, US Women, UK, and Mondopoint (centimetres and inches) using the internationally recognised ISO 9407 lookup table.
Understanding shoe sizes matters more than most people realise. Ordering the wrong size means returning goods, paying extra postage, and waiting weeks for a replacement. Getting the conversion right the first time saves money and frustration — especially for expensive footwear like hiking boots, dress shoes, or performance trainers.
There is no single mathematical formula that converts shoe sizes across all systems. Instead, each sizing system has its own historical origin, and the relationship between them is captured in a standardised lookup table defined by ISO 9407. Our calculator reads directly from this table to give you accurate, norm-compliant results.
The Mondopoint value — expressed in centimetres — is particularly useful because it represents the actual foot length the shoe is designed to fit. This makes it the most objective reference point. For example, a foot that measures 26.5 cm corresponds to EU 42, US Men 9, US Women 10.5, and UK 8. These values are fixed by the standard, not derived by calculation.
Pro tip: If you have recently measured your foot, enter the centimetre value directly. The Mondopoint measurement is the most reliable starting point because it reflects your actual foot length rather than a market convention.
James wears EU size 43 and wants to buy sneakers from a US retailer that only lists US Men sizes. He enters EU 43 into the calculator and instantly sees that this equals US Men 10, UK 9, and 27.5 cm in Mondopoint. He selects US Men 10 and completes his order confidently.
Sophie normally buys US Women size 7.5. She is browsing a British shoe website that lists only UK sizes. The calculator shows her that US Women 7.5 equals UK 5, EU 38, and 24.5 cm. She orders UK 5 without hesitation.
David measured his foot at 29 cm. He enters this into the Mondopoint field and learns that 29 cm corresponds to EU 45, US Men 11.5, US Women 13, and UK 10.5. He now has everything he needs to shop in any country or on any website.
Shoe sizing systems like ISO 9407 define a standard, but individual brands design their lasts — the foot-shaped forms used to build shoes — according to their own specifications. A size EU 42 from one brand may feel wider, narrower, or longer than the same nominal size from another. Always consult the brand's specific size chart and, where possible, read customer reviews about fit before purchasing.
The US system uses separate scales for men and women. For the same foot length, a US Women's size is approximately 1.5 sizes larger than the equivalent US Men's size. So US Men 8 and US Women 9.5 both fit a foot of the same length. If you are buying unisex footwear, always confirm whether the listed size is on the men's or women's scale to avoid confusion.
Not necessarily. Half sizes are common in US and UK systems but less frequent in some EU and Asian markets. If a direct half-size equivalent does not exist in the target system, it is generally safer to round up to the next full size rather than down. A slightly larger shoe can be worn with thicker socks, while a shoe that is too small cannot be made to fit comfortably.