If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.

If you need to average a list of values in Microsoft Excel that contain duplicates without including the duplicates, don't fret over a complex expression when you can easily remove those duplicates.

When counting unique values in Microsoft Excel, use UNIQUE() as a helper function and avoid more complicated expressions.

You can count the number of values in a single cell in Excel and Google Sheets that are seperated by comma using this function or formula.