Shoe Size Converter - Convert US, UK, EU & Asian Sizes
Convert shoe sizes between US, UK, EU, and Asian systems instantly. Accurate conversions for men's, women's, and kids' footwear with comprehensive size charts.
International Shoe Size Converter
Convert shoe sizes between different international systems
From Size
Valid range: 3 to 16
To Size
Valid range: 35 to 50.5
Size Chart
| US Men | US Women | UK | EU | CM | Australia (Men) | Japan |
|---|---|---|---|---|---|---|
| 7 | 8.5 | 6.5 | 40 | 25.0 | 6.5 | 25.0 |
| 8 | 9.5 | 7.5 | 41 | 26.0 | 7.5 | 26.0 |
| 9 | 10.5 | 8.5 | 42.5 | 27.0 | 8.5 | 27.0 |
| 10 | 11.5 | 9.5 | 44 | 28.0 | 9.5 | 28.0 |
| 11 | 12.5 | 10.5 | 45 | 29.0 | 10.5 | 29.0 |
| 12 | 13.5 | 11.5 | 46 | 30.0 | 11.5 | 30.0 |
| 13 | 14.5 | 12.5 | 47.5 | 31.0 | 12.5 | 31.0 |
This chart shows approximate conversions between different shoe sizing systems.
Documentation
What is a shoe size converter?
A shoe size converter is a tool that changes a shoe size from one national or regional sizing system into another, such as from UK sizes to EU sizes. It exists because countries measure and label shoe sizes in different ways, so the same foot length can carry a different number in each system.
Shoe sizing systems
- UK and US: both grew from the English barleycorn, about one-third of an inch per full size. Half sizes, one-sixth of an inch apart, appeared in the USA in 1887. The US uses separate men's and women's scales.
- Australia: producers and retailers in Australia and New Zealand use both the UK and US systems. This calculator's Australian column follows UK numbering.
- EU: the continental or Paris point system, used in mainland Europe and some Latin American countries, with 2/3 cm per full size.
- CM and JP: the length of the foot in centimeters. The Mondopoint system gives foot length in millimeters in steps of 5 mm, and Japan often writes it in centimeters, such as size 27. The calculator's CM and JP columns are identical.
The calculator covers US men's sizes 3 to 16 in half sizes, and the matching range in each other system.
How to calculate a shoe size conversion
This calculator uses US men's size as the reference point. In its table, the other systems sit at a fixed offset on every row:
- US women's size = US men's size + 1.5
- UK size = US men's size − 0.5
- Australian size = UK size
- CM (foot length) = US men's size + 18
Reversed, the last relationship gives a foot length in centimeters:
- US men's size = CM − 18
EU sizing does not follow one of these fixed offsets. An EU size step is shorter than a UK or US step, so the numbers do not line up evenly and EU sizes are read from a table. Published charts do not all agree. SATRA, a footwear research body, gives a US men's 12 as a UK men's 11, and a UK men's 9 as Mondopoint 270, a full size apart, while this calculator uses half a size.
Example
A foot that measures 27 cm converts to a US men's size with the CM formula:
27 − 18 = 9
A 27 cm foot is a US men's size 9. Checking a reference table shows the same size is UK 8.5, EU 42.5, and Australian 8.5.
For a size already known in one system, the table can be read directly. A US men's size 10 shoe is EU size 44 and UK size 9.5.
Shoe size conversion chart
| US Men | US Women | UK | EU | CM | Australia |
|---|---|---|---|---|---|
| 6 | 7.5 | 5.5 | 39 | 24 | 5.5 |
| 7 | 8.5 | 6.5 | 40 | 25 | 6.5 |
| 8 | 9.5 | 7.5 | 41 | 26 | 7.5 |
| 9 | 10.5 | 8.5 | 42.5 | 27 | 8.5 |
| 10 | 11.5 | 9.5 | 44 | 28 | 9.5 |
| 11 | 12.5 | 10.5 | 45 | 29 | 10.5 |
| 12 | 13.5 | 11.5 | 46 | 30 | 11.5 |
| 13 | 14.5 | 12.5 | 47.5 | 31 | 12.5 |
| 14 | 15.5 | 13.5 | 48.5 | 32 | 13.5 |
| 15 | 16.5 | 14.5 | 49.5 | 33 | 14.5 |
| 16 | 17.5 | 15.5 | 50.5 | 34 | 15.5 |
Half sizes fall between these rows in most systems.
Why converted sizes don't always fit
A converted size is a starting point, not a guarantee of fit. Shoe length varies between brands even inside the same sizing system, and shoe style changes the fit too. Size numbers also describe length only. Many US and UK makers sell several width fittings, from very narrow to very wide, and width is left out of size conversion charts.
Frequently asked questions
What is the difference between US and UK shoe sizes? In this calculator, UK sizes are half a size smaller than US men's sizes, so a US men's 10 is a UK 9.5. Some references put the gap at a full size.
How do US men's and women's sizes compare? They are separate numbering scales. In this calculator a US women's size equals the US men's size plus 1.5, so a US men's 8 is a US women's 9.5.
How do I find my shoe size from a foot measurement in centimeters? Subtract 18 from the foot length in centimeters to get the US men's size. A 28 cm foot, for example, gives 28 − 18 = 10.
Are children's shoe sizes converted the same way as adult sizes? No. In the UK and US, children's sizes run from 0 to 13 and then start again at 1 for adult sizes, so adult conversion offsets do not apply. This calculator covers adult sizes only.
Why doesn't a converted size always fit correctly? Sizing varies between brands and shoe styles even within one system, and most systems leave out width. A converted size is an estimate, not an exact fit.
References
- SATRA Technology. The diversity of footwear sizing systems. SATRA Bulletin, December 2023 — barleycorn of about one-third of an inch; half sizes in 1887; Paris point full size of 2/3 cm; Mondopoint in 5 mm steps and centimeter sizes in Japan; US men 12 = UK men 11; UK men 9 = Mondopoint 270; Australia and New Zealand use both UK and US systems; children's sizes 0 to 13; width fittings.