Shoe Size Conversion Calculator
Convert foot measurements and international shoe sizes in seconds. Compare US men’s and women’s sizes with UK and EU equivalents.
Enter centimeters (e.g., 25.4) or millimeters (e.g., 254). The calculator detects the unit automatically.
Measuring tip
Trace your foot at the end of the day while standing. Measure the longest distance and use that length here.
US Sizes
Men: US 8
Women: US 9.5
International
UK: 7.5
EU: 41.0
Foot Length
25.4 cm (254 mm)
Closest match based on your foot length.
How to Use This Calculator
Measure or select a size
Use a ruler or Brannock device to measure foot length, or start with a known US, UK, or EU size.
Enter the value and convert
Select the appropriate input type, enter your measurement or size, and click calculate.
Review international equivalents
Compare US men’s/women’s sizes with UK and EU conversions to shop confidently worldwide.
Formula
Foot length (mm) = Foot length (in) × 25.4
US Men size ≈ (3 × Foot length in inches) − 22
US Women size ≈ US Men size + 1.5
The calculator uses an industry-standard comparison chart for accurate conversions and refines results to the nearest available half size.
Example: Foot length 25.4 cm → 254 mm → approximately US Men 8, US Women 9.5, UK 7, EU 41.
About the Shoe Size Conversion Calculator
Footwear sizing varies across regions and brands. This tool helps you translate between systems, especially when ordering shoes from international retailers or choosing unisex styles.
When to Use This Calculator
- Online shopping: Convert your local size to the retailer’s sizing system.
- Travel: Buy shoes abroad without guessing your size.
- Unisex footwear: Compare men’s and women’s size charts easily.
- Kids transitioning to adult sizes: Understand how adult conversion works.
Why Use Our Calculator?
- ✅ Dual inputs: Start with foot measurements or known sizes.
- ✅ Men’s & women’s sizing: Shows both simultaneously for quick comparison.
- ✅ International support: Converts to UK and EU systems with foot length in cm/mm.
- ✅ Mobile friendly: Use on your phone while shopping.
Common Applications
Footwear buyers: Order sneakers from overseas drops with confidence.
Retail associates: Assist customers switching between regional sizes.
Stylists: Translate shoe sizes for clients quickly.
Tips for Best Results
- Measure both feet—choose the larger measurement for comfort.
- Consider sock thickness and foot swelling when converting sizes.
- Check brand-specific size charts for final confirmation.
- For running shoes, add 0.5 size to accommodate toe splay.
Frequently Asked Questions
Are UK and US sizes the same?
No. UK sizes typically run one size smaller than US men’s sizes. For example, US 8 ≈ UK 7.
Can I use this for sandals or boots?
Yes, but consider the style. Hiking boots may need extra room; sandals can fit closer to your true foot length.
What about half sizes?
The calculator supports half sizes. If your measurement falls between sizes, try both for best comfort.
How accurate is the conversion?
It’s based on ISO standards, but manufacturer variations exist. Always consult brand-specific charts when available.