Shoe size converter

A shoe size converter turns one adult footwear size into the matching values on the other common retail scales so you can shop across regions without guessing. Enter a numeric size, choose the source scale among US, UK, EU, or centimetre last length, and set gender to men or women; the tool returns US, UK, EU, and centimetre equivalents plus the pivot last length in inches, centimetres, and millimetres with substitution steps you can paste into a size chart or customer ticket. Cross-border shoppers, marketplace sellers, customer-support agents, and app developers wiring a size picker all need the same deterministic mapping.

How US, UK, EU and centimetre shoe sizes relate

Adult shoe size systems describe the length of the last—the rigid form the upper is built around—not always the bare foot measurement a customer took with a tape at home. This converter uses a single last-length pivot in inches and four standard closed formulas so every scale stays consistent with the others.

For United States men's sizes the relation is size equals three times last length in inches minus twenty-four; for United States women's sizes the constant is twenty-two point five instead of twenty-four, which is why a men's US nine and a women's US ten and a half share the same last length. The British scale uses size equals three times last length in inches minus twenty-five for both genders once the last is known.

The European continental scale uses Paris points: size equals one and a half times last length in centimetres, so converting from EU multiplies the size by two thirds to recover centimetres. The centimetre field is that last length in centimetres—closely related to Mondopoint foot length in millimetres, which this response also reports as ten times the centimetre value. Gender is always required because the US constants differ and because UK and US labels on tags are still marketed as men's or women's even when the underlying length math is shared.

Half sizes are first-class numbers; you may send nine point five or forty-two point five and the formulas stay continuous. Brand lasts, width letters, and children's scales are deliberately out of scope so the SEO landing stays focused on adult length conversion rather than fitting advice.

Ranges, practical tips, and when to use this landing

Published adult ranges reject nonsense before conversion: US men three through sixteen, US women four through thirteen, UK men two through fifteen, UK women one through twelve, EU thirty-two through fifty for both genders, and centimetre last length twenty through thirty-three. Prefer bare numbers for size when you control the client; string numbers are accepted only when they match a strict finite numeric pattern without units glued on.

Round-trip checks are straightforward: convert a US men's nine to EU and back and confirm you recover the original within the published twelve-decimal rounding. When teaching size charts, pair classic examples such as men's US nine, women's US eight, and an EU forty-two with gender set so students see the US constant difference.

This landing targets people searching for a shoe size converter, US to EU shoe size, UK to US shoes, or centimetre foot length to shoe size online; it is not a children's size chart, not a width or Brannock-width tool, and not a brand-specific fit predictor. Prefer this capability when you already have one adult length-based size and need deterministic equivalents across US, UK, EU, and centimetres; if you only need to convert generic length units without shoe formulas, use a general unit converter instead.