US to EU bra size converter
Turns the inch band into the European cm band and matches the EU cup letter.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter us band and us cup.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Band: US and UK 32 = EU 70 = FR 85 = IT 1 = AU 10, and each step adds 2 in (US, UK), 5 cm (EU, FR), 1 (IT) or 2 (AU). Cup: letters are matched by position. UK: AA A B C D DD E F FF G, US: AA A B C D DD DDD G H I, EU, FR and IT: AA A B C D E F G H I.
Example
Inputs: US band = 34, US cup = DD (E). Result: EU size: 75E; UK size: 34DD; French size: 90E.
Limits and caveats
- Follows the usual retail chart; some brands differ by one cup size.
- Some US brands label DDD as F, and Australian cup letters past F are not consistent, so they are not shown.
Questions about this tool
How does band 34 become 75?
The EU band is the underbust in cm in 5 cm steps, and US 34 matches EU 75 on standard charts.
Why is US DD an EU E?
European sizing uses no doubled letters, so the cup after D is simply E.
Does this work for German sizes?
Yes. Germany and most of Europe use the same EU system, written like 75B.