# Fermi Coupling Constant

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

## fermiCoupling

Fermi coupling constant

Try it yourself:

```calculio
fermiCoupling
```

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## Fermi Coupling Constant

**fermiCoupling** sets the scale of weak interactions in low-energy particle physics.

## Specialized use

It is used in beta-decay and weak-process formulas, where natural-unit conventions are common. Check the unit system and relate energy scales to [planckConstant](https://calcul.io/constants/planckConstant/index.md) only with a consistent formulation.

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