- Underwire (US inch) = digits + (alphabet – 2) * 2
- Diameter (US inch) = (underwire – 7) / 6
- Diameter (EU metric cm) = [digits + (alphabet * 4) – 12] / 6
- Volume (cm^3) = (diameter cm)^3 * Pi / 12
- Weight (kg, one breast) = volume * 0.0009
Examples
32I (US)
- 32 + (9 – 2) * 2 = 46
- (46 – 7) / 6 = 6.5
- (EU only)
- 16.51^3 * Pi / 12 = 1178.175…
- 1178.175… * 0.0009 ≈ 1.06
Volume: 1178 cm^3; Weight: 2.1 kg
80E (EU)
- (US only)
- (US only)
- [80 + (5 * 4) – 12] / 6 = 14.666…
- 14.666…^3 * Pi / 12 = 825.967…
- 825.967… * 0.0009 ≈ 0.74
Volume: 826 cm^3; Weight: 1.5 kg