Shield Coverage:  The following equation can be used to determine the percent coverage  of a braided or spiral shield.
Braid	Spiral
Variable Definition D Diameter under shield, inches d Diameter of strand, inches (Typically #30 AWG Solid to #40 AWG Solid) P Picks per inch N Number of strands per carrier (Typically integer values of 1 to 13) a Shield angle, degrees % Percent coverage (Must be less than 100%)
Where: % = (2F-F2) x 100 for Braid Shields   % = 100 x F for Spiral Shields     And:
Shield Resistance:
The D.C. resistance for braided shields can be calculated using the following equation:
Variables R D.C. resistance, (ohms/m') for the braided shield construction r D.C. resistance of 1 strand (ohms/m') a Braid angle, degrees N Number of strands per carrier C Number of carriers