# Mass

> Override the mass. A rotational inertia that is not itself overridden is scaled to the overridden mass, as if the same shapes had a different uniform density.

## Definition

* **Type:** Field
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
Mass = 1
```