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# ChartingExtensions

The **ChartingExtensions** class provides helper methods useful for converting a pixel coordinate from application-specific pixels (i.e., WPF coordinates) to Device Independent Pixels.

More information about the differences between application pixels and device pixels can be found on the [Working with Pixel Coordinates](/developer/desktop-sdk/guides/educational-resources/working-with-pixel-coordinates) page.

## ChartingExtensions Helper Methods

| Method                                                                                                                        | Description                                                                   |
| ----------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------- |
| [ConvertFromHorizontalPixels](/developer/desktop-sdk/references/common/charts/chartingextensions/convertfromhorizontalpixels) | Converts a horizontal coordinate (x) from device pixels to application pixels |
| [ConvertFromVerticalPixels](/developer/desktop-sdk/references/common/charts/chartingextensions/convertfromverticalpixels)     | Converts a vertical coordinate (y) from device pixels to application pixels   |
| [ConvertToHorizontalPixels](/developer/desktop-sdk/references/common/charts/chartingextensions/converttohorizontalpixels)     | Converts a horizontal coordinate (x) in application pixels to device pixels   |
| [ConvertToVerticalPixels](/developer/desktop-sdk/references/common/charts/chartingextensions/converttoverticalpixels)         | Converts a vertical coordinate (y) in application pixels to device pixels     |