When you use DATEDIF in a SharePoint Calculated field and the result is negative the function returns #NUM! how can I detect that value with an IF to branch around it?

=IF(DATEDIF(NOW(),[Proposal Status Date],"d")="#NUM!",1,2)

Ultimately, overdue "Proposals" return a negative value which isn't cool with DATEDIF.

Thanks! I hope this makes sense.

Guess I could just compare the dates first (?) -- just asking...

  • Such a great question. Stack overflow gave me a badge... Weee... No one voted for it though... Commented Apr 22, 2019 at 3:30

2 Answers 2


Use the ISERROR() function.

=IF(ISERROR(DATEDIF(NOW(),[Proposal Status Date],"d")),1,2)
  • ISERR: Value refers to any error value except #N/A.

  • ISERROR: Value refers to any error value (#N/A, #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL!).

  • ISNA: Value refers to the #N/A (value not available) error value.

IS functions


This can be resolve by using this formula :

=IF(ISERROR(DATEDIF(NOW(),[Proposal Status Date],"d")), -DATEDIF(NOW(),[Proposal Status Date],"d"))

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