Shoe Size International Converter Formula
Understand the math behind the shoe size international converter. Each variable explained with a worked example.
Formulas Used
UK Size
uk_size = us_mens_size - 0.5EU Size
eu_size = us_mens_size + 33Foot Length (approx)
cm_length = us_mens_size * 0.847 + 17.145Variables
| Variable | Description | Default |
|---|---|---|
us_mens_size | US Men's Size | 10 |
How It Works
International Shoe Size Conversion
Shoe sizing systems differ by country. These conversions use standard industry formulas.
Formulas (Men)
UK = US - 0.5
EU = US + 33 (approximate)
Foot Length (cm) = US x 0.847 + 17.145
These are guidelines. Width varies significantly between brands and countries. European shoes tend to run narrower than American shoes.
Worked Example
Converting US men's size 10.
us_mens_size = 10
- 01UK = 10 - 0.5 = 9.5
- 02EU = 10 + 33 = 43
- 03Foot length = 10 x 0.847 + 17.145 = 25.6 cm
Ready to run the numbers?
Open Shoe Size International Converter