Gravure Cell Calculator
Open from the View menu or click the icon on the Gravure Parameters window. 
The Screens and Angles entered in the Gravure Parameters windows are used to calculate the cell sizes.
Select the type of Ohio Engraver from the drop-down: English or Metric.
Enter a Distance and select the Units.
Select what results to show from the drop-down: nearest qcell/rev or snap amount.
Specify if WebComp values (from Gravure Parameters, Engrave Options) should be used.
Complete information is in the Collage online help.