a = Slot Opening / (Wire Width + Slot Opening)
Example: .020 Opening / (93 Wire Width (.089) + .020 Opening) = 18.3% Open Area
DECIMAL EQUIVILANTS FOR SCREEN OPENING SIZES
MICRON
MESH
MILLIMETERS
INCHES
FRACTION
6,400
3.9
6.350
0.2500
1/4
5,700
3.5
5.66