> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/sel-faq/using-the-software/files/converting-rpx-files-to-ec6-fo.md).

# Converting RPX Files to EC6 Format

How to convert RetainPro RPX files into ENERCALC EC6 project files using the built-in File menu converter.

## How can I convert RetainPro files to ENERCALC Project Files?

ENERCALC SEL Build 20 offers the menu item File > Convert RetainPro RPX file to EC6 Project File. It allows you to select an existing RetainPro RPX file and convert it into EC6 format, so it can be opened in ENERCALC SEL.


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