How to Calculate Shoe Size International Converter
What is Shoe Size International Converter?
The Shoe Size International Converter translates shoe sizes between US (with separate men's and women's scales), UK (closer to men's US − 0.5), EU (Continental Europe, 33-49+), JP/CM (Japanese, in centimeters of foot length), and Mondopoint (ISO 9407 international standard, foot length in mm). Each system uses different measurement bases, so conversion is essential for online international shopping. The calculator includes separate tables for men's, women's, and children's shoes since sizing differs significantly between genders.
Formula
- L
- Foot Length (cm/mm) — Heel to longest toe, barefoot
Step-by-Step Guide
- 1Select gender/age category (women, men, kids)
- 2Enter shoe size and source system
- 3Calculator finds closest match in size table
- 4Outputs US, UK, EU, CM, and Mondopoint equivalents
- 5For most accuracy: measure foot length in cm and use that as input
Worked Examples
Common Mistakes to Avoid
- ✕Using men's table for women's shoes — sizes are not interchangeable (Women's 8 ≠ Men's 8)
- ✕Confusing kids'C (child) and Y (youth) — different size scales within kids category
- ✕Measuring foot in shoe — measure barefoot; add 1cm for comfortable shoe fit
- ✕Ignoring shoe-specific sizing — running shoes typically run small; Italian shoes run narrow
Frequently Asked Questions
How do I measure my foot at home?
Stand on paper, mark heel and longest toe (often big toe but sometimes second toe). Measure mark-to-mark in cm. Add 0.5-1cm for comfortable fit. That's your length basis — works in CM, Mondopoint, and is the foundation for all conversions.
Do men's and women's shoes use same scale?
No, despite using same number. US Women's 8 ≠ US Men's 8. Women's sizes run about 1.5 sizes smaller than men's for same foot. Women's 8 = Men's 6.5. Important for unisex shoe shopping or borrowing across genders.
Why do shoe sizes vary by brand?
No universal sizing enforcement — brands set their own standards loosely calibrated to regional sizing. Nike runs small. New Balance runs wide. Italian designer brands run narrow. Always check brand-specific size charts and read reviews about fit.
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