Conductance is the reciprocal of resistance,
i.e. Conductance G = (1 / Resistance)
Units of Conductance are Siemens (S)
Calculating Resistors in Parallel Using Conductance:
G = G1 + G2 + G3 .....
(Total conductance is greater with more resistors in parallel so resistance is less.)
Calculating Resistors in Series Using Conductance:
(1/G) = (1/G1) + (1/G2) + (1/G3) .....
(Total conductance is less, because resistance is greater.)