> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Units overview

> Learn how to use units in Cognite Data Fusion (CDF) to standardize measurement data and enable seamless unit conversion.

<CardGroup cols={2}>
  <Card title="About units in CDF" icon="ruler" href="/dev/concepts/resource_types/units/units">
    Understand Units service and how it standardizes measurement data across time series and data models.
  </Card>

  <Card title="Contributing to the unit catalog" icon="git-pull-request" href="/dev/concepts/resource_types/units/contribute">
    Add new units and unit systems to the global unit catalog through GitHub.
  </Card>

  <Card title="Unit catalog changelog" icon="history" href="https://github.com/cognitedata/units-catalog/blob/main/CHANGELOG.md">
    View the latest changes to the global unit catalog.
  </Card>
</CardGroup>