OmniCalcsClothing Size Converter
Convert clothing sizes between US, UK, EU and Japanese systems — for tops, bottoms and shoes.
How to Use This Converter
Choose category and item, enter your size with its system, and convert to see all equivalent sizes at once.
- Women's sizing differs the most between systems.
- For shopping across brands, compare chest/waist measurements too.
Frequently Asked Questions
Why is UK women's clothing usually one size smaller than US?
Historically, US women's sizes run about one size larger than UK (e.g. US 8 ≈ UK 10) for the same fit.
Are shoe sizes converted differently?
Yes. US men's and women's shoe sizing differ, and EU sizes are roughly 1.5 sizes larger in number — this tool handles each separately.
What about Asian sizes?
JP sizes in this tool follow common charts. Asian clothing often runs smaller than Western equivalents, so verify with measurements.
Can I convert letters to numbers?
Yes — S, M, L, XL map to numeric baselines internally, so you can convert letter to number systems and back.
Practical Example
A woman with a US size 8 selects "Women", "Clothing", US as the system and enters "8". The tool returns UK 14, EU 40 and JP 13 — the same physical fit in each system. Choosing "Shoes" instead converts a US women's shoe size 8 to UK 6, EU 39 and JP 25.
- Women's sizes differ the most between systems, so always confirm against a brand chart.
What Your Results Mean
- Equivalent sizes — the corresponding size in each system for the same physical fit, based on common lookup tables.
- Letter grades — S, M, L and XL map to a numeric baseline, so letter and number systems can be converted in both directions.
- Shoe sizes — converted with separate men's and women's tables; EU shoe numbers run roughly 1.5 sizes higher than US.