US to UK bra size converter
Useful when you know your US size and want to buy from a UK shop.
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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 = 36, US cup = DDD (F). Result: UK size: 36E; EU size: 80F; French size: 95F.
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
What is a US 34G in UK sizes?
It is a UK 34F, because US G and UK F are both the eighth cup in their sequences.
Is US DDD the same as F?
Many US brands treat them as the same cup, and both match a UK E.
Do I change the band number?
No. The band number is the same in US and UK sizing since both use inches.