How do you calculate Conductance?

Use the formula G = 1 / R. Conductance is the reciprocal of resistance and measures how easily a component passes current, in siemens. Enter the values you know in the calculator above and it solves for the remaining variable.

What is the formula for Conductance?

The Conductance formula is G = 1 / R, where G—Conductance (S); R—Resistance (Ω).

Conductance

G = 1 / R

Calculator

Conductance

Resistance

Result

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Formula

G = 1 / R

Description

Conductance is the reciprocal of resistance and measures how easily a component passes current, in siemens. It is the natural quantity for analysing parallel circuits, where conductances simply add, just as resistances add in series. Working in conductance often makes node analysis and parallel combinations far simpler than juggling reciprocals of resistance.

Variables

G — Conductance (S)
R — Resistance (Ω)

Practical Notes

Parallel conductances add: Gtotal = G1 + G2 + …. The AC generalisation is admittance Y = 1/Z = G + jB, where B is susceptance.

Related Concepts

All Basic Electronics formulas →

Ohm's Law Electrical Power Voltage Divider Current Divider Thévenin Equivalent Norton Equivalent Temperature Coefficient of Resistance Kirchhoff's Voltage Law (KVL)

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