# Conductance Quantum Constant

Use Conductance Quantum in Calcul.io. See what this built-in constant represents, enter it in an editable calculation, and review related values and units.

## conductanceQuantum

Conductance quantum

Try it yourself:

```calculio
conductanceQuantum
```

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## Conductance Quantum

The **conductanceQuantum** is a fundamental unit of electrical conductance that appears in mesoscopic and quantum transport.

## Electrical use

It is related to [elementaryCharge](https://calcul.io/constants/elementaryCharge/index.md) and [planckConstant](https://calcul.io/constants/planckConstant/index.md). Its reciprocal is the resistance quantum; distinguish conductance in siemens from resistance in ohms.

[All constants](https://calcul.io/constants/index.md)