Finding the right shoe size across sizing systems takes about 10 seconds with the calculator above. Enter your known size in US, UK, or EU, and the tool instantly converts it to every other standard. You can also start with your foot length in centimeters or inches for a fresh measurement.
Shoe size conversion matters because the US, UK, and EU each use a different numbering scale. A US men's 10 is a UK 9 and roughly an EU 43. Without a reliable conversion, ordering shoes from international brands or retailers is guesswork.
This page covers how the converter works, how to measure your foot, and full size charts for women's, men's, and kids' footwear. Use it as a quick reference whenever you need to convert between sizing systems.
Shoe Size Converter: How It Works
The calculator maps your input to a set of standardized shoe size conversion charts. Pick your current system (US men's, US women's, UK, or EU), enter your number, and the tool returns the equivalent in every other system.
It also accepts a foot length measurement. Type your foot length in centimeters or inches, and the converter suggests the closest size in each system. This is the most accurate starting point if you have never been formally measured.
A few things to keep in mind:
- Results are approximate. Sizing standards are not perfectly uniform across every manufacturer.
- Half sizes exist in US and UK scales but not in the EU system, so some EU conversions round to the nearest whole number.
- Width is not included in the conversion. Width affects fit separately (covered below).
How to Measure Your Foot Size
A home measurement gives you a reliable baseline. All you need is a piece of paper, a pen, a ruler, and a hard floor.
Measure Foot Length From Heel to Toe
- Place a sheet of paper flat on a hard surface against a wall.
- Stand on the paper with your heel touching the wall. Wear the type of socks you plan to wear with the shoes.
- Mark the tip of your longest toe with a pen. For most people that is the big toe, but not always.
- Measure the distance from the wall edge of the paper to the mark in centimeters or inches.
- Repeat for the other foot. Use the measurement from the larger foot.
Your foot length in centimeters is the most universal input for any shoe size conversion. A 27 cm foot, for example, maps to roughly a US men's 9, a UK 8.5, and an EU 42.5.
Measure later in the day when your feet are slightly swollen. This gives a more realistic fit for everyday wear.
US, UK, and EU Shoe Size Conversion Charts
The charts below cover the most common size ranges. US and UK sizes increase in increments of roughly one third of an inch. EU sizes (sometimes called Continental sizes) use a unit called the Paris point, equal to about 6.67 mm per increment.
Women's Shoe Size Chart
| US Women's | UK | EU | Foot Length (cm) |
|---|---|---|---|
| 5 | 3 | 35.5 | 22.0 |
| 5.5 | 3.5 | 36 | 22.4 |
| 6 | 4 | 36.5 | 22.9 |
| 6.5 | 4.5 | 37.5 | 23.3 |
| 7 | 5 | 38 | 23.7 |
| 7.5 | 5.5 | 38.5 | 24.1 |
| 8 | 6 | 39 | 24.6 |
| 8.5 | 6.5 | 40 | 25.0 |
| 9 | 7 | 40.5 | 25.4 |
| 9.5 | 7.5 | 41 | 25.8 |
| 10 | 8 | 42 | 26.2 |
| 10.5 | 8.5 | 42.5 | 26.7 |
| 11 | 9 | 43 | 27.1 |
| 12 | 10 | 44 | 27.9 |
US women's sizes run roughly 1.5 sizes larger than US men's. A women's 8 is close to a men's 6.5.
Men's Shoe Size Chart
| US Men's | UK | EU | Foot Length (cm) |
|---|---|---|---|
| 6 | 5.5 | 39 | 24.0 |
| 6.5 | 6 | 39.5 | 24.4 |
| 7 | 6.5 | 40 | 24.8 |
| 7.5 | 7 | 40.5 | 25.2 |
| 8 | 7.5 | 41 | 25.7 |
| 8.5 | 8 | 42 | 26.0 |
| 9 | 8.5 | 42.5 | 26.5 |
| 9.5 | 9 | 43 | 26.8 |
| 10 | 9.5 | 44 | 27.3 |
| 10.5 | 10 | 44.5 | 27.7 |
| 11 | 10.5 | 45 | 28.1 |
| 11.5 | 11 | 45.5 | 28.5 |
| 12 | 11.5 | 46 | 28.9 |
| 13 | 12.5 | 47.5 | 29.7 |
| 14 | 13.5 | 48.5 | 30.6 |
UK men's sizes are typically about 0.5 lower than US men's sizes. EU sizes jump by about one full number per half US size.
Infant and Big Kid Size Conversion Chart
Children's sizes use their own scale and reset at certain ages. Infant sizes generally cover newborns through toddlers, while big kid sizes bridge the gap before adult sizing.
Infant / Toddler
| US Kids | UK | EU | Foot Length (cm) |
|---|---|---|---|
| 1C | 0.5 | 16 | 8.9 |
| 2C | 1 | 17 | 9.5 |
| 3C | 2.5 | 18.5 | 10.2 |
| 4C | 3.5 | 19.5 | 10.8 |
| 5C | 4.5 | 21 | 11.4 |
| 6C | 5.5 | 22 | 12.1 |
| 7C | 6 | 23 | 12.7 |
Big Kid
| US Kids | UK | EU | Foot Length (cm) |
|---|---|---|---|
| 1Y | 13 | 32 | 20.0 |
| 2Y | 1 | 33.5 | 20.9 |
| 3Y | 2.5 | 35 | 21.6 |
| 4Y | 3.5 | 36 | 22.4 |
| 5Y | 4.5 | 37.5 | 23.2 |
| 6Y | 5.5 | 38.5 | 24.0 |
| 7Y | 6 | 39.5 | 24.8 |
Kids' feet grow fast. Re-measure every two to three months and allow about a thumb's width of space between the longest toe and the end of the shoe.
Shoe Width and Fitting
Size conversion charts handle length. Width is a separate dimension that affects how a shoe actually feels on your foot.
How Width Affects Your Best Fit
US sizing uses letter codes for width:
- N or AA: Narrow
- M or D (men's) / M or B (women's): Medium (standard)
- W or EE: Wide
- XW or 4E: Extra wide
Most shoes ship in medium width unless the listing says otherwise. If the length feels right but the shoe pinches across the ball of your foot or your toes feel cramped in the toe box, you likely need a wider width rather than a larger size.
A few practical tips:
- Foot width can differ between your left and right foot. Fit to the wider one.
- Swelling increases foot width throughout the day. Try on shoes in the afternoon for the most realistic fitting.
- Sports shoes and safety shoes sometimes run narrower than casual styles, so check width options before ordering.
- If you are between sizes, going up a half size helps with length, but it will not solve a width problem.
Footwear Size Conversion by Brand
Size charts give you a strong starting point, but manufacturers use different lasts (the foot-shaped mold a shoe is built around). That means a size 9 from one brand may feel noticeably different from a size 9 from another.
Common reasons sizes vary across brands:
- Last shape. Some lasts are narrower through the midfoot or have a roomier toe box.
- Intended use. Running shoes often have a slightly larger internal volume than dress shoes at the same labeled size.
- Regional standards. A brand based in Europe may interpret EU sizing differently than one based in the US.
To reduce surprises:
- Check the brand's own size guide and compare it to your foot length in centimeters.
- Read reviews that mention fit. Phrases like "runs small" or "runs wide" are useful signals.
- When buying online, confirm the retailer's return or exchange policy before ordering.
- If a brand consistently runs a half size small for you, note it so you remember next time.
No universal conversion can account for every brand's interpretation. Use your foot length measurement as the most reliable anchor.
FAQ: Shoe Size Conversion
How Do I Convert My Shoe Size to UK Sizes?
For men's shoes, subtract about 0.5 from your US size to get the UK equivalent. A US men's 10 is roughly a UK 9.5. For women's shoes, subtract about 2. A US women's 8 is roughly a UK 6.
The calculator on this page handles the math instantly. Enter your US size, and the UK size appears alongside the EU and centimeter equivalents.
Australian shoe sizes generally follow UK sizing for men's and are close to US sizing for women's, though it is always worth confirming with the specific retailer.
What Is the Difference Between US and EU Shoe Size?
US sizes use an inch-based increment system. EU sizes use the Paris point (approximately 6.67 mm per size). The two scales start at different reference points, so the numbers do not align neatly.
As a rough guide, a US men's 9 equals about an EU 42, and a US women's 8 equals about an EU 39. The charts above give you the full range, or you can type your size into the converter for an instant answer.
How Do I Measure Foot Size in Centimeters?
Stand on a piece of paper on a hard floor. Mark your heel position and the tip of your longest toe. Measure the distance between the two marks with a ruler in centimeters.
That number is your foot length. Enter it into the calculator, and it maps directly to US, UK, and EU sizes. Measuring in centimeters is the most consistent method because it does not depend on any particular country's sizing system.
Why Does Shoe Fitting Vary Across Brands?
Brands build shoes on different lasts, which are the molds that determine internal shape. A narrow last produces a snugger fit at the same labeled size. Different types of shoes (dress, athletic, casual) also use different construction methods that affect how roomy the shoe feels.
Materials matter too. Leather stretches slightly over time, while synthetic uppers hold their shape. Always cross-reference your foot length in centimeters with the brand's own size guide for the best fit.
What Size Conversion Do I Use for Infant Footwear?
Infant and toddler shoes use a dedicated kids' scale that is separate from adult sizing. Use the Infant and Big Kid Size Conversion Chart above, or enter your child's foot length into the calculator.
Measure both feet and use the larger foot's measurement. Children's feet grow quickly, so leave about a thumb's width of space at the front of the shoe. Re-measure every few months to make sure the current size still fits.