# Device Independent Pixels

[Device Independent Pixels](https://en.wikipedia.org/wiki/Device-independent_pixel) (DIPs) is a unit type used in the [Document Processing libraries](https://www.telerik.com/document-processing-libraries/documentation/introduction) in the following cases:

* [RadSpreadProcessing](https://www.telerik.com/document-processing-libraries/documentation/libraries/radspreadprocessing/overview)—setting the width of the columns and the height of the rows.
* [RadPdfProcessing](https://www.telerik.com/document-processing-libraries/documentation/libraries/radpdfprocessing/overview)—setting the `FontSize` of `TextFragment` or `TextProperties`.
* [RadWordsProcessing](https://www.telerik.com/document-processing-libraries/documentation/libraries/radwordsprocessing/overview)—setting the `FontSize` of a `Run`.

## UnitHelper Class

The [UnitHelper](https://www.telerik.com/document-processing-libraries/documentation/api/telerik.documents.spreadsheet.utilities.unithelper) class provides several methods for converting from DIPs to other measurement units and vice versa (for example, points, picas, centimeters, and inches).

### Convert from DIP to Unit

| Method        | Description                   |
| ------------- | ----------------------------- |
| `DipToPoint`  | Converts DIPs to points.      |
| `DipToPointI` | Converts DIPs to points.      |
| `DipToPica`   | Converts DIPs to picas.       |
| `DipToCm`     | Converts DIPs to centimeters. |
| `DipToMm`     | Converts DIPs to millimeters. |
| `DipToInch`   | Converts DIPs to inches.      |
| `DipToTwip`   | Converts DIPs to twips.       |
| `DipToEmu`    | Converts DIPs to EMUs.        |
| `DipToTwipI`  | Converts DIPs to twips.       |
| `DipToTwipF`  | Converts DIPs to twips.       |
| `DipToUnit`   | Converts DIPs to units.       |

### Convert from Unit to DIP

| Method       | Description                   |
| ------------ | ----------------------------- |
| `PointToDip` | Converts points to DIPs.      |
| `PicaToDip`  | Converts picas to DIPs.       |
| `EmuToDip`   | Converts EMUs to DIPs.        |
| `CmToDip`    | Converts centimeters to DIPs. |
| `MmToDip`    | Converts millimeters to DIPs. |
| `InchToDip`  | Converts inches to DIPs.      |
| `TwipToDip`  | Converts twips to DIPs.       |
| `TwipToDipF` | Converts twips to DIPs.       |
| `TwipToDipI` | Converts twips to DIPs.       |
| `UnitToDip`  | Converts units to DIPs.       |

Most of the methods follow the same pattern for converting units.

The following example shows how to obtain row height as DIPs and convert it to points.

**Convert row height from DIPs to points**

```csharp
	var rowHeightInDips = worksheet.Rows[0].GetHeight().Value.Value;
	var rowHeightInPoints = UnitHelper.DipToPoint(rowHeightInDips);
```

The `DipToUnit` and `UnitToDip` methods accept not only the units but also the [UnitType](https://www.telerik.com/document-processing-libraries/documentation/api/telerik.documents.media.unittype) as a parameter:

The following example shows how to convert from points to DIPs and set the row height.

**Convert points to DIPs and set the row height**

```csharp
	double dips = UnitHelper.UnitToDip(60, UnitType.Point);
	RowHeight newRowHeight = new RowHeight(dips, isCustom: true);
	worksheet.Rows[0].SetHeight(newRowHeight);
```