Bra size converter
A bra size converter changes a tag between US, UK, EU, FR/BE, AU/NZ, and JP by matching its band label and cup letter in each system; only the label changes.
Your size in US
34C
Same size in the other systems
- US34C
- UK34C
- EU75C
- FR/BE90C
- AU/NZ12C
- JP75D
Sister sizes
- 30DD
- 32D
- 36B
- 38A
Conversions follow published charts and brands differ. Measure again and try on.
Conversion uses two chart matches: the band label follows the band chart, while the cup letter follows the difference the cup represents in each system. Difference means your bust minus the band. The band chart lists US and UK bands from 28 to 60, and the cup chart covers differences from 0 (less than 1) to 15 in. JP letters are listed only for differences 2 to 10 in.
For example, a US 34C maps to UK 34C, EU 75C, FR/BE 90C, AU/NZ 12C, and JP 75D. A US 34DD/E maps to UK 34DD, EU 75E, FR/BE 90E, AU/NZ 12DD, and JP 75F. A US 32B maps to UK 32B, EU 70B, FR/BE 85B, AU/NZ 10B, and JP 70C. A US 36D maps to UK 36D, EU 80D, FR/BE 95D, AU/NZ 14D, and JP 80E.
US, UK, EU, FR/BE, and AU/NZ use the same cup letters for differences from 0 to 4 in. At 5 in, their labels split: US uses DD/E, UK and AU/NZ use DD, while EU and FR/BE use E; JP uses F. Published charts disagree on AU/NZ at 8 in: some use G and another uses FF. At 10 in, some use I and another uses GG. JP cup letters vary by brand.
A conversion changes the tag wording only. It does not measure your body, and different methods can give the same body different tags. A calculated size is a starting point, as methods, rounding, and charts differ between published guides. People measure again and try on.
Where next
Work out a size from measurements, see its sister sizes or read one system in full.
Bra size converter questions
How do I convert a US bra size to UK?
The band number is the same in US and UK sizing. The cup letters match up to DD and then part ways. A 36DDD in US sizing is a 36E in UK sizing.
How do I convert a bra size to EU or FR/BE?
EU and FR/BE bands are numbers in centimetres, not inches. A band of 36 in US sizing is 80 in EU and 95 in FR/BE, which is the EU number plus 15. The cup letters follow the difference between bust and band, so the converter changes them together with the band.
Why does a converted size say not listed?
Not listed means the system has no label at that point in its table. JP sizing, for example, lists cups from C to K only, so a smaller or larger cup has no JP label. The converter never guesses a size the tables do not hold.