# Gravitation Constant Constant

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

## gravitationConstant

Newtonian constant of gravitation

Try it yourself:

```calculio
gravitationConstant
```

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## Gravitational Constant

**gravitationConstant** is Newton’s G, the proportionality constant in universal gravitation. It relates two masses and their separation to gravitational force.

## Universal gravitation

Use G in F = Gm₁m₂/r² with SI masses and metres. Do not confuse it with [gravity](https://calcul.io/constants/gravity/index.md), the local acceleration near Earth’s surface. For orbital energy, combine it with [speedOfLight](https://calcul.io/constants/speedOfLight/index.md) only in the correct relativistic context.

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