Conductance is the measure of how easy the electric current flows in an electrical circuit. It's the inverse of electric resistance.
Electric conductance is calculated with this formula:
Conductance = 1 / R (Electric resistance) or Conductance = I (Current) / V (Voltage)
SI unit of electric conductance is siemens (S). It's also called mho (spelled backwards of ohm, resistance unit). Other units are millisiemens, microsiemens, ampere/volt, kilosiemens, megasiemens.