> 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/other-features/duration-data-field.md).

# Duration Data field

In a xViz Gantt Chart, it's possible to create Gantt Chart without an End Date column. Instead, we can use the project Duration to create the Gantt Chart.

<figure><img src="/files/cyfbgjIIHcXSl8HqBoyt" alt=""><figcaption><p><em>Image 1: xViz Gantt Chart created with using Duration data field</em></p></figcaption></figure>

We have a dataset with an Actual Start Date and Duration column, but it does not include an Actual End Date column, as shown in the image below:

<figure><img src="/files/M23tcfbAilvLhiBO5ApF" alt="" width="563"><figcaption><p><em>Image 2: Dataset</em></p></figcaption></figure>

Now, populate the Actual Start Date and Duration columns into the Start Date and Duration fields, respectively.

<figure><img src="/files/K09ZQWKXtCg0xn5KbvWH" alt="" width="180"><figcaption><p><em>Image 3: Populate Start Date and Duration field</em></p></figcaption></figure>

{% hint style="info" %}
The Duration field can only be populated if the End Date data field is empty.
{% endhint %}

In the final result, the Gantt Chart is created without using the End Date and is displayed in the image below.

<figure><img src="/files/cyfbgjIIHcXSl8HqBoyt" alt=""><figcaption><p><em>Image 1: xViz Gantt Chart created with using Duration data field</em></p></figcaption></figure>