Microsoft Excel might show ##### in cells when a column isn’t wide enough to show all of the cell contents. Formulas that return dates and times as negative values can also show as #####.
To make a column wider to show cell contents in full, select the right edge of the column header and drag it to the width you want.
You can also try the following:
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To make the cell contents smaller, on the Home tab, select
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If numbers have too many decimal places, on the Home tab, select Decrease Decimal.
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If dates are too long, on the Home tab, select the Number Format arrow, and pick Short Date.
Correct negative dates or times
When Excel shows ##### because the cell has a negative date or time value, make sure that you:
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Verify dates and times are positive values when you’re using the 1900 date system.
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Use a formula to subtract dates or Add or subtract time correctly to avoid negative date or time value results.
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Change negative formula results that are formatted as dates or times to a different number format.
