The ArcMap Field Calculator can be used inside and outside of an edit session. Some editable data, however, cannot be calculated outside of the edit session.
Note: The content in this article pertains to ArcGIS versions 8.x. Later versions of ArcGIS may contain different functionality, as well as different names and locations for menus, commands and geoprocessing tools.
The following cases indicate when the calculator will be disabled
outside of an edit session.