Determine Cup Size Calculator

Measured snugly around the ribcage directly under the bust, on a firm exhale.
Measured loosely around the fullest part of the bust, standing upright.
The +0 method is what specialist fitters use; +4/+5 is the traditional US department-store method.
Cup
DDD
Bra Size Calculator
Bra size
32DDD
Band size
32
Band, US/UK inches
32 in
Bust minus band
6.00 in
Cup step above AA
6
Size by the other band method
36B
Worked out from Bra size - consumer measurement methods and the international band/cup equivalence charts and 2 other sources.
Bra labelling is an industry convention, not a standard: cut varies between brands and even between styles from one brand. Treat this as a starting size to try on, not a measurement.

How this is worked out

4 steps
  1. Underbust 32 in, bust 38 in.
  2. +0 method: round 32 to the nearest even inch - band 32.
  3. Bust minus band = 38 - 32 = 6 in, which is 6 whole cup steps above AA.
  4. US / North America labelling: band 32, cup DDD - 32DDD.
Sister sizes (same cup volume)table
30DDDD, 34DD
The same bra in other systemstable
US / North America: 32DDD, UK: 32E, EU (Germany, Netherlands, Scandinavia): 70F, France / Spain / Belgium: 85F, Italy: 2F, Australia / New Zealand: 10E, Japan: 70F

Results are general information, not financial, tax, legal, medical or engineering advice.