👟 Sizing Tool
Shoe Size
Conversion Calculator
Instantly convert US, UK, EU, JP, and CM shoe sizes for men, women, and kids — with a foot length estimate and complete international sizing table.
🌍 Fast International Conversion
👟 Fashion & Sneaker Friendly
✓ Accurate Size Matching
Shoe Size Conversion Calculator: Convert International Shoe Sizes Instantly
Shopping for shoes from international brands — whether it’s Nike from the US, Adidas from Germany, or Clarks from the UK — means navigating different sizing systems that don’t always align neatly. This free shoe size conversion calculator converts between US, UK, EU, CM, and JP sizing for men, women, and unisex styles, with foot length equivalents and a complete international size chart.
👟 Quick rules: US Men’s → EU: add approximately 33. US Men’s → UK: subtract 0.5. US Women’s → US Men’s: subtract 1.5. EU sizing is the most consistent internationally — when in doubt, go EU.
International Shoe Size Conversion Table
| US Men’s | US Women’s | UK | EU | CM | Inches |
|---|
| 7 | 8.5 | 6 | 40 | 24.8 | 9.75″ |
| 8 | 9.5 | 7 | 41 | 25.4 | 10.0″ |
| 9 | 10.5 | 8 | 42.5 | 26.1 | 10.25″ |
| 10 | 11.5 | 9 | 44 | 26.7 | 10.5″ |
| 11 | 12.5 | 10 | 45 | 27.3 | 10.75″ |
| 12 | 13.5 | 11 | 46 | 27.9 | 11.0″ |
Online Shopping Tips for Shoe Sizing
📏Measure your foot correctly
Place your foot flat on paper, trace the outline, and measure from heel to longest toe in cm. Measure both feet (they’re often different sizes) and use the larger measurement. Measure in the afternoon when feet are slightly larger. This CM measurement is the most reliable cross-brand sizing reference.
🏃Running shoes: size up
For running shoes, most fitters recommend ½ to 1 full size larger than your everyday casual shoe. Your feet expand during running due to heat and impact, and toes need space to spread. A thumb’s width of space between your longest toe and the shoe end is ideal for running footwear.
🌍EU sizing is most universal
EU sizing is the most consistent international standard and is used by most major brands globally — Adidas, Nike, Puma, and virtually all luxury brands. If ordering from multiple international stores, using EU size as your reference and converting to local size is the safest approach.
↔️Width matters too
Most standard shoes are made for medium (M or B for women, D for men) width feet. Wide widths are often marked W, 2E, or 4E. If you have wide feet, sizing up half a size in standard-width shoes is a common workaround, though purpose-made wide sizes provide a better fit. Narrow feet may size down half.
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Frequently Asked Questions
How do I convert shoe sizes internationally?
Select your current shoe system (US Men’s, US Women’s, UK, EU, or CM) and your size, then choose the target system. The calculator looks up your size in industry-standard conversion tables and shows all international equivalents simultaneously. The most reliable conversion method is to use your foot length in cm as the universal reference — measure your foot and use the CM/JP option as your starting point for the most accurate result across all systems.
What is a US size in EU sizing?
As a rough guide, add 33 to a US Men’s size to get EU: US Men’s 8 ≈ EU 41, US Men’s 10 ≈ EU 44, US Men’s 12 ≈ EU 46. For US Women’s sizes, add 31: US Women’s 8 ≈ EU 39, US Women’s 10 ≈ EU 41. These are approximations — EU sizes go in increments of 0.5 to 1, and the exact conversion depends on foot length. The calculator above uses lookup tables for maximum accuracy.
What is the difference between UK and US shoe sizes?
US Men’s sizes are 0.5 larger than UK sizes: US Men’s 10 = UK 9.5, US Men’s 11 = UK 10. For women, the gap is larger: US Women’s sizes are 2 larger than UK sizes: US Women’s 8 = UK 6, US Women’s 10 = UK 8. This means a UK shoe and a US shoe with the same number on the box are NOT the same size — the UK shoe is smaller. This is a very common source of sizing confusion when shopping across US and UK brands online.
How do I measure foot length correctly?
Place a sheet of paper on a hard floor, stand on it with your heel against a wall, and trace your foot. Measure the longest distance from heel to the tip of your longest toe in centimetres. Measure both feet (they are often slightly different sizes) and use the larger measurement. Do this in the afternoon, as feet swell slightly during the day. This CM measurement is the most reliable starting point for international shoe size conversion.
Why do shoe sizes vary by brand?
Shoe sizing standards are guidelines, not precise international law. Each brand creates their own lasts (foot forms used to build shoes) based on their target market and aesthetic preferences. A Nike size 10 and a New Balance size 10 may feel different in length, width, and volume. Italian luxury brands often run narrower and shorter than American athletic brands. Running shoes typically have more volume than dress shoes even in the same size. Always check brand-specific size guides and customer reviews mentioning fit for the best online shopping outcomes.
Are EU sizes unisex?
Yes — EU sizing is based purely on foot length (in Paris Points, each equal to 2/3 cm) and is effectively unisex. EU 42 represents the same foot length regardless of gender. This makes EU sizing the most straightforward for international conversion. By contrast, US and UK systems use gender-differentiated numbering for the same foot length (US Men’s 10 = US Women’s 11.5 = EU 44 — all fitting the same foot length of approximately 26.7 cm).
Find your international size
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