Bra Size Calculator
Last updated:
Quick answer
Enter your under-bust band and full bust in inches. The difference sets the cup: 1 in is A, 2 in is B, 3 in is C, 4 in is D. A 30 in band and 34 in bust returns 30D.
Cup size by difference
| Difference (in) | US | UK | EU |
|---|---|---|---|
| 0 | AA | AA | AA |
| 1 | A | A | A |
| 2 | B | B | B |
| 3 | C | C | C |
| 4 | D | D | D |
| 5 | DD-E | DD | E |
| 6 | DDD-F | E | F |
| 7 | G | F | G |
| 8 | H | FF | H |
| 9 | I | G | I |
| 10 | J | GG | J |
| 11 | K | H | K |
Need to measure first? Follow how to measure your bra size.
Frequently asked questions
How is the cup calculated?
Bust minus band, in inches, matched to the cup chart.