Not sure I am doing this right and need help. If Column B is blank Column A should multiply by Column C. If Column B has info B need to multiply by C

=IF([Column B]="IsBlank" AND, ([Column A]=!Blank), then [ColumnC]*[Column A])
IF ([Column B]=!Blank, then [ColumnC]*[Column B])

2 Answers 2


Try using formula like below for your SharePoint calculated column:

=IF(ISBLANK([Column B]),IF(ISBLANK([Column A]),"",[Column A]*[Column C]),[Column B]*[Column C])


  1. Sometimes comma(,) does not work in formula (it is based on language or regional settings on your site). So in that case use semicolon(;) instead of comma(,).
  2. Use correct display name of your SharePoint columns in above formula.
  3. Wrap column names inside [] if your column name has space in it. For example: [My Column Name].

You could use following formula.

=IF(AND(ISBLANK([Column B]),NOT(ISBLANK([Column A]))),[Column A][Column C],[Column B][Column C])


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