# SQRT2_DBL

> The square root 2. Approximately 1.41. This is a f64/double precision constant.

## Definition

* **Type:** Field
* **Namespace:** [Unity.Mathematics](/engine/6000.7/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

```csharp
public const double SQRT2_DBL = 1.4142135623730951
```