> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/ladybug-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/ladybug-primer/components/4_extra/to_si.md).

# To SI

![](/files/-MihillAczbYL3Xt_GdO)

![](/files/-MihillBZ_0KQGdj99bg) - [\[source code\]](https://github.com/ladybug-tools/ladybug-grasshopper/blob/master/ladybug_grasshopper/src//LB%20To%20SI.py)

Convert a DataCollection to SI values.

### Inputs

* **data\_ip \[Required]**

A DataCollection in IP (or other) units.

### Outputs

* **data\_si**

The DataCollection in SI units.