Cup Size Calculator
Determine your exact bra cup size from your measurements. Understand what each cup letter means and find your perfect cup fit.
Cup Size Calculator
Enter your band and bust measurements
inches
inches
Understanding Bra Cup Sizes
Your cup size is determined by the difference between your bust measurement and your band size. Each inch of difference corresponds to a cup letter.
Cup Size Chart
| Difference (inches) | US Cup Size | UK Cup Size | EU Cup Size |
|---|---|---|---|
| <1" | 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 |
Common Cup Size Myths
- Myth: D cup means large breasts. Reality: Cup size is relative to band size. A 32D has a much smaller cup volume than a 40D.
- Myth: You can tell cup size by looking. Reality: The same cup volume looks very different on different body types.
- Myth: Cup sizes are universal. Reality: US, UK, and EU cup progressions differ after D cup.