Copper Contributor

Hi All,


Is there any way I can use sumproduct to count the number of times the difference between Column B and Column C is less than or equal to 1?


B-C <= 1

E.g.   =SUMPRODUCT(--( B2:B10 - C2:C10 <=1 ) ) [DOESNT WORK]



5 Replies


If you don't have Microsoft 365 or Office 2021, confirm the formula by pressing Ctrl+Shift+Enter.


If you want to count the number of times the difference is less than or equal to one in either direction, use




again confirmed by pressing Ctrl+Shift+Enter if you have an older version of Excel.

Thank you so much for your help.

One problem I am facing is some rows of C2:C10 are empty.
Is there anyway i can write the formula such that it can still auto-calculate without making changes to the data?


How about





Hello, unfortunately it still gives an error "#VALUE!" 

Can anyone help to resolve this?


Could you attach a small sample workbook demonstrating the problem (without sensitive data), or if that is not possible, make it available through OneDrive, Google Drive, Dropbox or similar?