# Sandbox.SandboxSystemExtensions.ToFloatEval

```csharp
static float ToFloatEval(string expression, float Default = 0)
```

Convert to `T:System.Single`. Might be a string formula. This is always going to be slower than a call to [Sandbox.SandboxSystemExtensions.ToFloat](/api/Sandbox.SandboxSystemExtensions/ToFloat).

### Parameters

- `expression` (`string`)
- `Default` (`float`), default `0`

### Returns

`float`

Declared in [Sandbox.SandboxSystemExtensions](/api/Sandbox.SandboxSystemExtensions).
Assembly: `Sandbox.System`.