> For the complete documentation index, see [llms.txt](https://help.vectary.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.vectary.com/documentation/getting-started/units.md).
# Units
## Overview
Vectary utilizes an internal measurement system that can be defined only when importing/exporting a file or configuring augmented reality settings. \
### Available units
Metric system
Imperial system
millimeters
thou
centimeters
inches
decimeters
feet
meters
yards
kilometers
miles
### File Import
In the import settings menu, a preferred unit of measurement can be selected. Imported files will have their dimensions automatically converted according to the selected units. Once configured, this setting will be applied to all new projects by default, without the need for repeated selection.
### File Export
When selecting a file format that supports unit information, an additional field for specifying units will appear. Note that OBJ and STL formats do not store real-world unit data.
### AR Export
To set units for an AR model, navigate to the **Behavior** tab and select a preferred measurement unit.
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