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.

Learn how to count the number of unique and distinct values in a column based on data in another column using array in Microsof Excel.

Launch Excel and open one of your documents. Locate the status bar at the bottom of the window. Right-click that status bar to display a list of options. Click the "Count" option to place a ...

In Excel 2003, Subtotals is on the Data menu. In the resulting dialog, choose Count from the Function dropdown. Click OK and Excel will display a subtotal for each date in the Due column.