Is there any easy way to write and validate a SharePoint calculated field formula?
I am trying to find a formula builder like CAML builder!
Unfortunately, there is no such tool for
Calculated column formula.
Instead, use Excel!
Check the details at SharePoint: Creating Calculated Column Formulas the Easy Way Using Excel
Note: don't forget to replace ; to , in SharePoint Calculated Column, also there are some functions that supported in Excel and not supported in SharePoint Calculated Column.