Shoe Size Converter
Convert shoe sizes between regions
Shoe Size Converter tool
Size Chart Reference
• Men's sizes are typically 1 size larger than women's
• EU sizes are approximately 33-34 larger than US sizes
• UK sizes are approximately 1 size smaller than US sizes
• CM represents the length of the foot in centimeters
Shoe Size Converter: key facts
- What it does
- Convert shoe sizes between regions
- Category
- Other Calculators
- Cost
- Free, with no account, sign-up, or install.
- Your data
- Runs entirely in your browser — the files and text you enter are never uploaded to a server.
- Last reviewed
- . Report an incorrect result.
What this tool is for
Buying shoes from another country means decoding a different sizing system, and a US 9 is not a UK 9 or an EU 9. This converter translates a shoe size between US, UK, EU, and centimeter scales, with separate formulas for men, women, and kids.
Online shoppers use it when a store lists only one region's sizes, travelers use it abroad, and parents use the kids setting for fast-growing feet. By converting through the underlying foot length in centimeters, it keeps the cross-region results consistent rather than relying on a rough lookup.
How to use the Shoe Size Converter
- Select the wearer: men, women, or kids.
- Enter a size and choose which region it is in (US, EU, UK, or CM).
- Read the equivalent sizes in all the other systems.
- Use the centimeter figure as the most reliable cross-check when buying online.
Foot length is the common ground
Every conversion here routes through foot length in centimetres, because that is the only measurement all the regional systems actually describe. Converting US to EU directly would mean maintaining a table of arbitrary pairings; converting each system to and from a length keeps the relationships consistent.
European sizing has the most direct relationship to length, being based on the Paris point of two-thirds of a centimetre. The tool applies the standard approximation of one and a half times the length in centimetres plus two, which is why EU sizes move in whole numbers while US sizes move in halves.
Because these are approximations of systems that were never mathematically unified, expect a converted size to land between two available options at times. Rounding up is generally safer than rounding down.
- A foot length of 28 cm converts to approximately EU 44.
- US men's and women's sizing differ by about 1.5 for the same foot, which is why a unisex model lists two numbers.
- UK sizes run roughly one below US men's sizes for the same length, a legacy of the two systems having separate origins.
What the Shoe Size Converter gets right
- It uses separate conversion formulas for men, women, and kids, since the same number means different lengths across those categories.
- It converts through actual foot length in centimeters, which keeps US, UK, and EU results consistent with one another.
- It shows all four systems at once, so one entry answers whichever region a store uses.
- It runs locally and instantly with no account.
Why a converted size is a starting point
Shoe sizing is not standardised in any meaningful sense, and manufacturers differ from each other more than the regional systems differ. Two pairs of the same nominal size from different brands routinely fit differently, and the same brand can be inconsistent between models, because the shape and volume of the last — the form a shoe is built around — matters at least as much as length.
Width is the dimension conversions ignore entirely and the one that most often decides comfort. Some manufacturers offer width fittings and many do not, and a foot that is broad for its length will fit poorly at any length that is nominally correct.
Practical measuring advice: measure late in the day, since feet swell measurably over the course of it; measure both feet and work from the larger, as most people have a mismatch; and measure while standing, in the socks you intend to wear. For running shoes, allow around a centimetre of clearance at the toe, since feet slide forward on impact — which is why running shoes are often bought a half or full size up. Where possible, try before buying, and treat any converted number as a place to start rather than an answer.
Frequently Asked Questions
Why isn't a US size the same as a UK size?
The US and UK scales start counting from different points, so the same foot maps to different numbers — a US men's size is roughly half a size larger than the UK equivalent. EU sizing uses an entirely different scale based on length. That is why a converter is needed.
Which measurement is most reliable for ordering online?
The centimeter measurement of your foot length is the most dependable, because it does not depend on a brand's interpretation of a size number. Measure your foot, convert here, and compare against a retailer's size chart in centimeters when possible.
Do men's and women's sizes really differ?
Yes. For the same foot length, men's and women's size numbers differ by roughly one and a half sizes in the US system, which is why this converter asks you to select the wearer before converting.
Are converted sizes exact across every brand?
No conversion is perfect, because brands cut shoes differently and some run large or small. Use the result as a strong starting point, then check the specific brand's size guide and reviews, especially when you cannot try the shoes on.
