Calculated columns allow you to create and display custom metrics for your project. See Working with calculated columns for full details on creating columns and using them in status reports, saved layouts, and turf panels.To manage your calculated columns:
Go to Settings and type “calc” in the search box, then select Calculated columns.
The settings page lists all calculated columns for your project. From here you can view, edit, and delete any column, or click + New Calculated Column to create one.