# Quantum Of Circulation Constant

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

## quantumOfCirculation

Quantum of circulation

Try it yourself:

```calculio
quantumOfCirculation
```

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## Quantum of circulation in superfluids

**quantumOfCirculation** is the fundamental circulation unit in superfluid flow. Quantized vortices carry circulation in integer multiples of this value.

## Context

It connects quantum mechanics with macroscopic fluid behavior through [planckConstant](https://calcul.io/constants/planckConstant/index.md) and particle mass. Use [multiply](https://calcul.io/function/multiply/index.md) to calculate integer vortex multiples.

## Caveats

The applicable mass and convention depend on the superfluid system. It is not the same quantity as [magneticFluxQuantum](https://calcul.io/constants/magneticFluxQuantum/index.md); keep units and physical setting explicit.

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