---
title: backingScaleFactor
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsscreen/backingscalefactor
---

# backingScaleFactor

The backing store pixel scale factor for the screen.

## Declaration

```swift
var backingScaleFactor: CGFloat { get }
```

## Discussion

Discussion This is the scale factor representing the number of backing store pixels corresponding to each linear unit in screen space on this screen. This method is provided for rare cases when the explicit scale factor is needed.  As often as possible, you should use the NSView class’s convert backing methods.

## See Also

### Converting Between Screen and Backing Coordinates

- [backingAlignedRect(_:options:)](appkit/nsscreen/backingalignedrect(_:options:).md)
- [convertRectFromBacking(_:)](appkit/nsscreen/convertrectfrombacking(_:).md)
- [convertRectToBacking(_:)](appkit/nsscreen/convertrecttobacking(_:).md)