Enter the total cross-sectional area, resistivity of the component, and length into the calculator to determine the conductance.

Conductance Formula

The following formula is used to calculate the conductance of an electronic component.

C = A / (p * L)
  • Where C is the conductance (siemens)
  • A is the area (m^2)
  • p is the resistivity
  • L is the length (m)

Area (m^2) measures the size or extent of a two-dimensional space, expressed in square meters.

Resistivity is the inherent property of a material that measures its ability to resist the flow of electric current.

The length is the distance from one point to another, typically expressed in meters.

What is Conductance?

Conductance is a fundamental concept that describes how easily electric current flows through a material. It measures how conductive or “friendly” a substance is to the movement of electric charges. Conductance is influenced by various factors, including the type of material, its shape, and the temperature.

Think of conductance as a sort of “openness” towards electricity. Just like a wide-open highway allows cars to flow smoothly, a material with high conductance lets electric charges move freely. On the other hand, a narrow, congested road slows down traffic, just like materials with low conductance restrict the flow of electric charges.

To measure conductance, we use a unit called Siemens (S). A high conductance value means that the material allows a large amount of current to pass through it. In contrast, a low conductance value indicates that the material resists the current flow.

The conductance of a substance depends on its ability to conduct electricity. Materials like metals, which have loosely bound electrons that are free to move, exhibit high conductance. They allow electric charges to flow effortlessly, giving them excellent conductive properties.

In contrast, materials such as rubber or plastic have tightly bound electrons that cannot move as easily. Consequently, they have low conductance and are considered poor conductors. These materials restrict the flow of electric charges, similar to how a narrow, winding road slows down traffic.

It is important to note that conductance is not the same as resistance, although they are related. Resistance represents the opposition to the current flow in a material, while conductance quantifies the ease with which current flows. Conductance and resistance are inversely proportional, meaning that as conductance increases, resistance decreases, and vice versa.

Understanding conductance is crucial for designing efficient electrical systems, such as circuits and power grids. By selecting materials with high conductance, we can minimize energy losses and ensure a smooth flow of electricity. So, whether you’re plugging in your phone or lighting up a room, conductance plays a vital role in keeping the current flowing smoothly through the electrical devices we rely on daily.

Conductance Example

How to calculate conductance?

  1. First, determine the area.

    Calculate the total area of the material.

  2. Next, determine the resistivity.

    Calculate the resistivity of the material.

  3. Next, determine the length.

    Measure the total length of electron flow.

  4. Finally, calculate the conductance.

    Calculate the conductance using the formula above.


What is conductance?

Conductance is a measure of a material’s ability to allow electrons to flow through it.

What is resistivity?

Resistivity is a measure of the resistance of flow to electrons.

conductance calculator
conductance formula