# Magnetic Flux Quantum Constant

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

## magneticFluxQuantum

Magnetic flux quantum

Try it yourself:

```calculio
magneticFluxQuantum
```

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## Magnetic flux quantum

**magneticFluxQuantum** is the quantum of magnetic flux, important in superconductivity and Josephson-junction physics.

## Use

It relates [Planck’s constant](https://calcul.io/constants/planckConstant/index.md) and elementary charge in quantum electromagnetic formulas. Use [to()](https://calcul.io/function/to/index.md) for webers and [format()](https://calcul.io/function/format/index.md) to report scales.

## Caveat

Do not confuse flux quantum with magnetic field; field depends on area as well as flux.

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