Shoe Size Converter
Instantly convert between US, UK, EU, CM, and Japanese shoe sizes for men and women. Get step-by-step conversion formulas and a visual size comparison chart.
Your Input
Convert Your Shoe Size
Select gender, enter your shoe size, choose the source and target systems, and click Convert to see instant results with a step-by-step formula.
Complete Shoe Size Conversion Guide
How Shoe Size Conversion Works
Shoe sizes vary between countries because each region developed its own sizing system. The US, UK, EU, and Japan all use different numbering. Our converter uses centimeters (foot length) as a universal intermediate unit — your size is converted to CM first, then converted to the target system. This ensures accurate results across all systems.
Source Size → CM (foot length) → Target Size
5 Sizing Systems Supported
US (United States)
The most common system in North America. Men's sizes 4-16, Women's sizes 4-14. Half sizes are common. Women's sizes are typically 1.5-2 numbers higher than men's for the same foot length.
UK (United Kingdom)
Used in the UK and some Commonwealth countries. Typically about 1 size smaller than US. Men's sizes 3-15, Women's sizes 3-13. Half sizes are available.
EU (Europe)
The Paris point system used across continental Europe. Sizes range from 35-50. Unisex — the same number applies regardless of gender. Whole sizes only (no half sizes).
CM (Centimeters)
Your actual foot length in centimeters, measured from heel to longest toe. The universal measurement that all other systems convert through. Range: 20-35 cm.
JP (Japan)
Japanese sizes are identical to centimeters — they represent the foot length in cm. Common in Japan and some other Asian countries.
Conversion Formulas
US Men's ↔ CM:
CM = (US + 22) × 0.847 | US = (CM ÷ 0.847) - 22
US Women's ↔ CM:
CM = (US + 20.5) × 0.847 | US = (CM ÷ 0.847) - 20.5
UK Men's ↔ CM:
CM = (UK + 23) × 0.847 | UK = (CM ÷ 0.847) - 23
UK Women's ↔ CM:
CM = (UK + 21.5) × 0.847 | UK = (CM ÷ 0.847) - 21.5
EU ↔ CM:
CM = (EU - 2) ÷ 1.5 × 2.54 | EU = (CM ÷ 2.54) × 1.5 + 2
Quick Shoe Size Conversion Chart
| US Men | US Women | UK | EU | CM |
|---|---|---|---|---|
| 6 | 7.5 | 5.5 | 39 | 24 |
| 7 | 8.5 | 6.5 | 40 | 25 |
| 8 | 9.5 | 7.5 | 41 | 26 |
| 9 | 10.5 | 8 | 42 | 27 |
| 10 | 11.5 | 9 | 43 | 28 |
| 11 | 12.5 | 10 | 44 | 29 |
| 12 | 13.5 | 11 | 46 | 30 |
Shoe Sizing Tips
- Sizes can vary between brands and shoe styles. Always try on shoes when possible.
- Measure your feet in the evening when they are slightly larger from daily activity.
- Consider shoe width as well as length — some brands offer wide or narrow options.
- Women's US sizes are typically 1.5-2 numbers higher than men's for the same foot length.
- When buying shoes online from international sellers, always check the brand's own size chart.
Frequently Asked Questions
What is US size 9 in UK?
A US Men's size 9 is approximately UK 8. UK sizes are generally about 1 size smaller than US. Use our converter for exact results.
How do I convert EU to US shoe size?
EU sizes use the Paris point system while US uses a different scale. For example, EU 42 ≈ US Men's 9. Enter your EU size in our converter for an accurate result.
Are women's and men's shoe sizes different?
Yes. In US sizing, women's sizes are about 1.5-2 numbers higher than men's for the same foot. In EU sizing, the numbers are the same for both genders.
How do I measure my foot in CM?
Stand on a piece of paper, trace your foot, and measure from your heel to your longest toe in centimeters. This gives you your CM/JP size directly.