Other Calculators / Free Tools
Free Shoe Size Conversion Calculator
Use this free shoe size converter to switch between US, UK, EU, and centimeter shoe sizes for men, women, and kids. Enter a size you know in any system and instantly see the equivalent in the others - no sign-up required.
What is a shoe size converter and why it matters
A shoe size converter translates a shoe size from one regional sizing system into another - US, UK, EU, or a foot length measurement in centimeters or inches. This matters because shoe sizing systems are regional and not directly interchangeable: a US size 9 is not the same number as a UK size 9 or an EU size 9, and buying from an international retailer or a brand based in a different country almost always means converting sizes first to avoid ordering the wrong fit.
How this calculator works
This tool uses standard published shoe size conversion charts for men, women, and kids, each mapping US, UK, EU, and foot length in centimeters against each other. Enter a size you know in any one system, and the calculator finds the closest matching row in the size chart and displays the equivalent size across all the other systems at once.
Common searches this calculator answers
- What is my shoe size in UK sizing?
- How do I convert US shoe size to EU size?
- What size shoe should I order from a European or UK retailer?
- How do I convert my foot length in cm to a shoe size?
- What is the kids' shoe size equivalent to an adult size?
How to use it
- Choose Men, Women, or Kids using the tabs.
- Select the sizing system you already know your size in - US, UK, EU, or foot length in cm or inches.
- Enter the size or measurement.
- Click Convert size to see the equivalent size across all systems at once.
Tips
- For the most accurate result, measure foot length directly rather than converting from a size you're unsure of - stand on a piece of paper, mark your heel and longest toe, and measure the distance in centimeters.
- Measure feet in the afternoon or evening, since feet naturally swell slightly over the course of the day.
- When ordering from a new brand, check if they publish their own size chart - some run noticeably narrow or wide compared to the standard conversions shown here.
- Kids' shoe sizing changes quickly as they grow - it's worth re-measuring foot length every few months rather than assuming last season's size still fits.
Frequently asked questions
Is this shoe size converter free to use?
Yes. It is completely free, works in your browser, and does not require any sign-up or download.
Why don't shoe sizes match exactly between brands?
Shoe sizing is set by each manufacturer based on internal lasts (the foot-shaped mold shoes are built around), which vary between brands even within the same country's sizing system. A conversion chart gives a reliable starting point, but exact fit can still vary from brand to brand.
Is women's US sizing the same number as men's US sizing?
No. Women's and men's US sizes are offset - a US women's size is typically about 1.5 sizes higher than the equivalent US men's size for the same foot length, which is why this calculator has separate tables for each.
What's the most accurate way to find my true size?
Measuring your actual foot length in centimeters and matching it to a brand's specific size chart is more reliable than converting a size you already own, especially if that shoe's fit was already loose or tight.
Do kids' shoe sizes follow the same chart as adults?
No. Kids' sizing uses its own numbering that resets before transitioning into adult sizing, so this calculator uses a separate kids-specific conversion table rather than adjusting the adult chart.
