Free Shoe Size Converter – US, UK, EU & CM for Men & Women

Convert Shoe Sizes Between US, UK, EU, and CM Instantly

A shoe size converter translates a size from one country's numbering system into every other major system the moment you enter it. This one covers the US, UK, EU (Continental European), and CM (Mondopoint, which is simply the foot length in centimetres) for both men and women separately. Pick your gender, choose the system you know, type your size, and the matching values in every other system appear at once, along with the foot length in centimetres that the size corresponds to. Anyone buying shoes from an overseas website, reading a label that shows only one system, or shopping for someone else when you only know their size in a different scale has exactly this problem, and guessing a size leads to an expensive return. Shoe sizing is genuinely confusing because there is no single global standard, and the systems differ in more than just numbering. The UK scheme runs in thirds of an inch and does not separate men and women, so a UK 9 means the same length regardless of gender. The US scheme also runs in thirds of an inch but uses different numbers for men and women, so a US men's 9 is not the same foot length as a US women's 9. EU sizes run in two-thirds of a centimetre per step, which is why they use half sizes less often, and they do not usually separate genders either. The CM or Mondopoint system is the most anatomical because it measures the foot itself: a 27 cm foot is a 27 cm foot in every country. That means if you stand on a ruler and get 27 centimetres, you can use that number directly to find the matching US, UK, and EU sizes without worrying about which numbering convention applies. Here is a concrete example. Suppose you measure a foot at 27 centimetres and want to buy a pair of men's trainers from a US store. Looking up 27 cm in the men's chart, the converter returns US 9, UK 8.5, and EU 42.5. If instead you know your size is US women's 8 and you are buying from a European site, enter 8 with the women's chart and the tool shows EU 39 and about 24.5 cm. These mappings are compiled from the standard size tables used across multiple brands, giving you a strong starting point even when a brand's own chart is not available. The practical uses are frequent and specific. A shopper on a US site converts their UK size into the American scale before adding to cart. A parent measures a child's foot in centimetres and looks up the EU size for a European brand. Someone buying a gift knows the recipient's US size and needs the UK equivalent because the store is British. A traveller picks up shoes abroad and wants to confirm a labelled EU size against their known US size. Resellers listing secondhand shoes add all four systems to the description so buyers from any country can identify their fit. In each case the converter turns an otherwise cryptic number into something actionable. A few cautions keep expectations realistic. These conversions are averages across many manufacturers, and actual fit varies because brands interpret sizes differently, especially at the extremes of narrow or wide lasts. For the most reliable result, measure your foot length in centimetres on a flat surface and use the CM value as the primary lookup, then cross-check against the brand's own chart if one is provided. Half sizes may not map neatly between systems, so the converter rounds to the nearest standard step. Children's sizes use a different scale and are not covered here, only adult sizing is included. If a result shows 'outside supported range' it means the entered size falls beyond the standard adult chart, so try the CM system with your measured foot length instead. Everything runs locally in your browser with no server call, so it is instant, works offline once the page has loaded, and never uploads, logs, or stores any size or measurement you enter.

Shoe Size Converter Formula & Method

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