Calculate the Percentage of Open Area of a Shutter Type Screen

Input
Screen Type
Outside Diameter of Screen   inches mm
Slot length   inches mm
 For Ful Flo Shutter Screen, slot length = 2" for diameters 8" or less,and 3" for diameters 10" and larger.
  For Super Flo Shutter Screen, slot length = 2" for all diameters
Width of slot opening inches mm
Number of slots per unit length (See Links to Tables Below)  /foot /meter
(Ful Flo Shutter Screen data table For Stainless, HSLA, and Copper-Bearing Steels )
(Ful Flo Shutter Screen data table For Mild Steel )
(Super Flo Shutter Screen data table For Stainless, HSLA, and Copper-Bearing Steels )
Result
Percentage of Open Area of a Shutter Type Screen   %
Square inches of Open Area /ft
Square centimeters of Open Area /m
The flow in gallons per minute per foot of screen gpm/ft of screen  /  lps/m of screen