> For the complete documentation index, see [llms.txt](https://docs.xviz.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xviz.com/project-management/progress/progress-base.md).
# Progress Base
In xViz Gantt Chart, the Progress Base data field is used to calculate the Progress% using the Progress data field.
Image 1: Calculate Progress using Progress data field & Progress Base data field
Let's understand how the Progress Base data field works with an example.
In the xViz Gantt Chart, the Progress % is calculated by dividing the "Progress" data field by the "Progress Base" data field.
In the image below, you can see the DAX calculation, which divides the "Progress" column by the "Progress Base" column.
Image 2: DAX measure
As a result, the DAX measure provides the Progress % for each task. The image below shows that the Progress % for each task is same in the xViz Gantt Chart and the Table visual.
Image 2: Example to understand Progress Base data field
{% hint style="info" %}
The DAX measure and Table visual shown above are provided only for reference to understand the calculation
{% endhint %}
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