Shoe Size Converter

What this shoe size converter does

Every shoe brand you shop with seems to use a slightly different size system depending on which country's warehouse it shipped from. This tool converts between US, UK, EU, and actual foot length in centimeters or inches for Men's, Women's, and Kids' sizing, using the same standard conversion charts shoe brands themselves publish — not a rough add-a-constant formula that falls apart at the edges of the size range.

Foot length is the most reliable input if you have it, since it's the one measurement that doesn't depend on which country's sizing convention a brand happens to use. Enter it in cm or inches and get every regional size at once, or go the other way — enter a US, UK, or EU size and see the closest match across every other system plus the foot length it corresponds to.

How to use it

Pick a category (Men's, Women's, or Kids'), choose what you're converting from, and enter the value. The result shows your closest match across all four systems, plus the full reference chart below it with your matched row highlighted — handy for eyeballing the half-sizes above and below yours too.

A real example

A foot length of 27 cm converts to US Men's 9 / UK 8.5 / EU 42.5 — but the exact same 27 cm foot on the Women's chart lands at US 10 / UK 8 / EU 42, which is why "just add 1.5" mental math between men's and women's sizes only gets you in the right neighborhood, not the exact size, especially once you're comparing across UK and EU too.

Frequently asked questions

How do I measure my foot length accurately?

Stand on a piece of paper against a wall, mark the wall at your heel and at the tip of your longest toe, then measure the straight-line distance between the marks in cm. Measure both feet in the evening (feet swell slightly through the day) and use the larger of the two.

Why don't US and UK sizes just have a fixed offset?

They're close to a fixed offset in the middle of the range but drift slightly at the small and large ends because the two systems are built on different base units (UK sizing traditionally uses barleycorns, roughly 1/3 inch per size) — which is exactly why a real conversion chart, not a single formula, gives you the accurate match.

Are kids' shoe sizes based on age?

No — always size by current foot length, not age or a size from six months ago. Kids' feet can grow half a size or more in just a few months, so a fresh foot-length measurement is the most reliable way to buy the right size.

Should I size up if I'm between two sizes?

Generally yes for closed-toe shoes, especially athletic shoes — a little extra room at the toe is more comfortable than a cramped fit, though it varies by brand and shoe style, so check the specific brand's fit notes when you can.

Is this the exact same chart every shoe brand uses?

This reflects the standard, widely-published US/UK/EU conversion most brands follow, but individual brands (especially athletic and boutique labels) sometimes run slightly small or large — when in doubt, check that specific brand's own size chart too.