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In Google Spreadsheet, is there a way to conditionally format a cell if it has more than 30 characters?

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2 Answers 2

Not on the cell itself, without the usage of Google Apps Script. Adding a helper column will allow you get realy close:
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A1 and A4 both have more than 30 characters. Set the whole column to have a conditional format like this:
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Now add the following formula in B1:


This will check column A, whether the entry has more than 30 characters and will return TRUE or FALSE.

See example file I've prepared: more than 30 characters

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If your cell is A1, in New Google Sheets, in Custom formula is please try:

=len(A1)>30 withRange: `A1` and the formatting of your choice.
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