Shoe Size Converter
Convert a shoe size between US, UK, and EU systems for men's or women's footwear in one tap.
Example
A US Men's 10 has a foot length of about 27.9 cm. That converts to roughly UK 9.5 and EU 43.3. The same foot in women's labeling is about US Women's 11.5.
How it works
Sizes are derived from foot length: US men ≈ 3·len_in − 22 (Brannock), UK = US men − 0.5, EU ≈ len_cm/0.667 + a small offset. Women's US ≈ men's US + 1.5. We convert your input to a foot length, then express it in every system.
Good to know
The Shoe Size Converter takes a single size you already know — say a US Men's 10 or an EU 39 — and instantly rewrites it across the US, UK, and EU systems, while also showing the underlying foot length in centimetres. Because shoe brands and online stores from different countries label the same foot in completely different numbers, this tool is built for anyone buying footwear abroad, ordering from an international retailer, or trying to decode a size chart that only lists one region's numbers.
Pick whether you're shopping in men's or women's labeling, choose which system your known size is in (US, UK, EU, or raw foot length in cm), and type the number. The big EU figure and the four stat boxes update as you type, so you can read your equivalents at a glance. The foot-length value is the most useful anchor here: it's the physical measurement everything else is derived from, so if a brand publishes a length-based size chart, matching that centimetre number is far more reliable than matching a label.
A few things worth knowing as you read the result. The converter works in half-size steps, so it rounds to the nearest 0.5 — a slightly unusual input may land on the same displayed size as a neighbouring value. Men's and women's results for the same foot differ by about 1.5 sizes by design, which is why switching the gender toggle visibly shifts the US number.
Treat every output as a starting point, not a guarantee. Real fit depends on the brand's last shape, the shoe's width, and the material, none of which a pure size formula can capture. The most practical move is to measure your foot length in centimetres at the end of the day when your feet are largest, enter that directly, and size up rather than down whenever you fall between two numbers.
Frequently asked questions
Why do US men's and women's sizes differ for the same foot?
They use the same length scale but different starting labels. A women's US size is about 1.5 sizes higher than the men's size for an identically sized foot, so US Women's 9.5 fits roughly the same foot as US Men's 8.
Are these conversions exact across all brands?
No. Conversions are based on standard Brannock and continental size formulas, but real fit varies by brand, last shape, and width. When you fall between two sizes, choose the larger one.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser. Your inputs never leave your device, and it works offline once loaded.
Is this calculator free?
Yes, completely free with no sign-up and no limits.
People also ask
How do I measure my foot length for shoe size conversion?
Stand on a piece of paper with your heel against a wall, mark the tip of your longest toe, and measure the distance in centimetres. Do this in the late afternoon or evening, when feet are slightly larger, and use the longer foot if they differ.
What is a US Men's 10 in UK and EU sizes?
A US Men's 10 is roughly a UK 9.5 and about EU 43, with a foot length near 27.9 cm. Exact fit still varies by brand, so check the retailer's own size chart when possible.
Is EU shoe sizing the same for men and women?
Yes, EU sizes use one unified scale based on foot length, so the same EU number applies to both men's and women's shoes. The split into separate men's and women's numbers mainly happens in the US system.
Should I size up or down when between two shoe sizes?
Generally size up. A slightly larger shoe can be adjusted with thicker socks or an insole, while a too-small shoe usually cannot be made comfortable.
Why don't online size charts agree with each other?
Each brand uses its own last (the mould the shoe is built around) and its own interpretation of the size scale, so the same labeled size can fit differently. Converting by foot length in centimetres is the most consistent way to compare across brands.
Can I convert a child's or kids' shoe size with this tool?
This converter is built around adult men's and women's scales, so kids' sizing — which uses different formulas and a separate numbering range — won't convert accurately here. Use a dedicated children's size chart instead.
Does the converter account for shoe width?
No, it only handles length-based size conversion. Width (such as US D, E, or EE designations) is a separate measurement, so a converted size that matches your length may still feel tight or loose if your feet are wide or narrow.
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