Convert / Bras
Bra size converter
UK, US, EU, FR and AU. Cups are counted along each brand's own letter order, because US brands disagree after DD.
37 brand charts, each read from the brand's own size guide.
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How this converter decides
A cup letter is a position in a brand's own sequence. The converter counts positions on each brand's chart, so a brand that runs D, DD, DDD, G and one that runs D, DD, E, F both land on the right cup.
Every answer names its source. The formula is arithmetic. A brand chart is the brand's own claim about the body a size is built for. Wearers are people who own both and told us what fits; they appear once five of them stand behind an answer, and until then the panel says so instead of guessing.