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Sum a column of numbers returns a zero, even though the column has actual numbers that don't sum to zero

Hugh Larsen 0 Reputation points
2026-04-30T01:13:19.0866667+00:00

When I click on a cell that has the sum function (for example: =sum(A4: A9) and the cells contain non-zero entries, when I click on the cell, it returns a zero, as if the sum of the column of numbers adds to zero, regardless of the numbers in the column. This just started happening recently. Why?

Microsoft 365 and Office | Excel | For home | MacOS
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  1. Bob Jones AKA CyberTaz MVP 435K Reputation points
    2026-04-30T12:48:46.3166667+00:00

    To convert the text to values can't be done simply by changing the cell Format...

    Select the cells which contain the digits then go to the Data tab & click the Text to Columns tool. Click Finish in the conversion wizard dialog.

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  2. Jeronimo Fuerte 38,760 Reputation points Independent Advisor
    2026-04-30T01:57:50.3733333+00:00

    This usually happens when the values look like numbers but are actually stored as text, especially if they were copied/imported from another source. Excel’s SUM ignores text entries, so a range full of text-formatted “numbers” can return 0. To test this, enter =ISNUMBER(A4) in a blank cell. If it returns FALSE, the value is not being treated as a real number. Converting text-formatted numbers to real numbers must resolve this situation.

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