Shoe Size Conversion
Convert shoe sizes between US, UK, EU, CM, and other international standards.
Shoe Size Conversion
Convert shoe sizes between US, UK, EU, CM, and other international standards.
Unit Conversion
ℹ️ All units normalised to a common base before converting to ensure accuracy
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
Always double-check your unit conversion direction — dividing when you should multiply (or vice versa) produces a result off by the conversion factor squared.
For temperature conversions, remember the formulas differ: Celsius to Fahrenheit = (C × 9/5) + 32. Fahrenheit to Celsius = (F − 32) × 5/9. Kelvin = Celsius + 273.15.
Imperial units have multiple definitions (fluid ounce vs weight ounce, US vs UK gallon). Always confirm which system applies — especially for cooking or scientific work.
Significant figures matter in scientific conversions. If your input has 2 significant figures, don't report 6 decimal places of precision — it implies false accuracy.
When to Use This Calculator
Convert between metric and imperial units for temperature, distances, weights, and speeds when travelling abroad.
Convert between US and metric measurements for international recipes or ingredient scaling.
Convert units for scientific calculations where SI units are required.
Convert between measurement systems when working with international suppliers or standards.
Convert units to compare product sizes and prices across different packaging formats.
About the Shoe Size Conversion
This shoe size calculator converts any shoe size between US men's, US women's, UK, European (EU), Japanese (cm), and Korean sizing systems so you can shop confidently across brands and countries. Select your known size and system, and instantly see the equivalent size in every other standard. Includes separate conversion tables for men, women, and children, since sizing conventions differ by gender and age group.
How to Use the Shoe Size Conversion
- 1
Select the size system you know: US Men's, US Women's, UK, EU, Japan (cm), or Korea.
- 2
Enter your size in that system.
- 3
See your equivalent size in all other systems instantly.
- 4
Note that half-sizes may map to the nearest full size in some systems.
- 5
When in doubt, measure your foot length in cm and use the cm-based conversion for the most accurate result.
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