Shoe Size Converter

Shoe size conversion translates foot measurements between the different sizing systems used around the world. The three major systems are US (separate scales for men and women, based on barleycorn increments of 1/3 inch), UK (numeric, slightly smaller than US), and EU (based on the Paris Point system, where each size equals 2/3 cm or approximately 6.67 mm). Additionally, the centimeter (cm) measurement represents the actual foot length and serves as the most universal reference.

Because each system uses a different scale, unit, and sometimes gender-specific sizing, buying shoes from international retailers or converting between systems can be confusing. A US Men's 10 is not the same as a US Women's 10, and the relationship between US and EU sizes is not a simple linear formula. The conversion depends on the foot length in centimeters, which is then mapped to each system's scale.

This converter handles all five sizing systems (US Men's, US Women's, UK, EU, and centimeters) and shows the equivalent size in every system simultaneously. Whether you are ordering shoes online from an international store, trying to find your European size from a US measurement, or simply trying to understand the relationship between sizing systems, this tool provides instant and accurate conversions.

The conversions between sizing systems are based on the foot length in centimeters. The US system uses an offset from a baseline measurement with an increment of 0.847 cm per size.

Each sizing system has its own logic and geographic region:

The US Women's system is offset from Men's by approximately 1.5 sizes for the same foot length. The UK system is about 0.5 sizes smaller than the US Men's system for the same foot.

Convert shoe sizes between any systems:

1. Enter a Size: Type the shoe size number in the input field.
2. Select the Source System: Choose from US Men, US Women, UK, EU, or Centimeters.
3. Select the Target System: Choose the system you want to convert to.
4. View the Result: The converted size appears instantly, along with equivalents in all other systems.

Use the swap button to quickly reverse the conversion direction. The "Quick Reference" section below the calculator shows common conversions and the offset rules between systems (e.g., US Men to Women: add 1.5 sizes).

Online international shopping is the primary use case for shoe size conversion. E-commerce platforms sell globally, but shoe sizing varies by region. A customer in the UK shopping from a US retailer needs to know their US size. An American buying European-brand shoes needs to convert to EU sizing. Getting the conversion wrong means expensive returns and delays.

Travel and relocation often expose people to different sizing systems. A person moving from the US to Europe or vice versa needs to learn their new local shoe size. Having a reliable conversion tool eliminates confusion at the shoe store.

Athletic shoe fitting requires precision because performance shoes (running, cycling, soccer) must fit exactly. Different athletic brands may fit slightly differently even within the same system, so understanding your centimeter measurement helps ensure consistent fit across brands. Many running shoe brands provide their shoes in centimeter (cm) sizing for this reason.