Bra size calculator: EU, FR, UK and US sizes
Measure under your bust and around your bust: you get an indicative size for Europe, France, the UK and the US.
Result
75BEurope size (EU)
- France / Belgium / Spain size
- 90B
- UK size
- 34B
- US size
- 34B
- Bust − underbust
- 15 cm
- Indicative size: every brand fits differently. Always try it on.
Inputs
- Under the bust
- 75
- Around the bust
- 90
How it is calculated
EU band = underbust rounded to the nearest 5 cm (EN 13402 standard).
Result
Europe size (EU)
- France / Belgium / Spain size
- 90B
- UK size
- 34B
- US size
- 34B
How it is calculated
- EU band = underbust rounded to the nearest 5 cm (EN 13402 standard).
- French band = EU band + 15.
- Cup from the difference: AA 10-12 cm, A 12-14 cm, B 14-16 cm, then one letter every 2 cm.
- UK and US: EU 65 = 30, then + 2 per 5 cm step. Letters after D differ (DD, E, F…).
Example
Underbust 75 cm and bust 90 cm: difference 15 cm, so 75B in EU, 90B in France, 34B in the UK and the US.
Good to know
- Brands do not all follow the same charts: your real size can be one or two sizes off.
- The UK/US charts used here are common retail charts, not an official standard.
- Breast shape matters as much as measurements.
Sources
- EN 13402-3 standard (size designation of clothes)
- Lingerie manufacturers’ size guides
Frequently asked questions
What is this tool used for?
Measure under your bust and around your bust: you get an indicative size for Europe, France, the UK and the US.
How is the result calculated?
EU band = underbust rounded to the nearest 5 cm (EN 13402 standard).
What should I check before using the result?
Brands do not all follow the same charts: your real size can be one or two sizes off.