> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/data-model-fields-and-units/temperature-delta-units.md).

# What units is the sleep temperature delta in?

The temperature delta field in sleep payloads is in **degrees Celsius**.

It represents the **deviation of body temperature during sleep relative to the user's baseline**, not an absolute temperature.