> For the complete documentation index, see [llms.txt](https://docs.stacksync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacksync.com/two-way-sync/connectors/airtable/formula-fields.md).

# Formula Fields Overview

## Formula Fields in Airtable

Formula fields in Airtable are **calculated fields** whose values are generated dynamically from other fields using custom formulas.\
Because their values are computed rather than stored, they do not trigger standard change events when the underlying data changes.

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### Syncing Formula Fields with Stacksync

Stacksync **synchronizes Airtable formula fields every hour**.\
This ensures that even though Airtable formula fields don’t emit direct change notifications, their computed values remain up-to-date in your destination system.

#### How It Works

* Formula fields are detected automatically during setup.
* Stacksync will re-check and update those formula field values every hour.