The Exchange 2013 Server Role Requirements Calculator received an update to reflect changed incorporated in Exchange 2013 CU2, like the increased maximum number of databases. The new version number is 6.1.

Changes since version 5.9:

• Fixed operator mistake in calcNumActiveDBsSF formula
• Fixed missed validation scenario where the calculator could recommend a copy count that could not be deployed on the custom disk architecture
• Optimized remaining servers formula
• Fixed an issue where single datacenter, multiple databases per volume architecture with lagged copies didn’t calculate the correct number of
  copies/volume
• Fixed VirtCPUFactor reference
• Various comment changes
• Improved cell highlights for insufficient disk capacity on storage design tab
• Added additional storage capacities – 1.2TB, 6TB and 8TB
• Fixed database count validation logic to take into consideration dedicated lagged copy servers

You can download the calculator here. For more information please consult the release notes and read me