How do I change a simple subtraction function =B3-A3 to return a blank cell if either of the 2 cells is blank?

1 Answer 1


Short answer

=IF(OR(ISBLANK(B3),ISBLANK(A3)),"A3 or B3 are blank",B3-A3)


  • Use ISBLANK to test if cell is blank
  • Use OR to check if any of its arguments is true
  • Use IF to return something if the condition returns true and other thing if the condition returns false

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