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.

How to Make Excel Continue to Count Up for Each Row. Entering a series of sequential numbers into an Excel spreadsheet, one per row, can be a time-consuming and repetitive task.

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.

Scanning Barcodes Into Excel Open Excel, and type "Inventory" or "Items" in the first cell and press Enter. You will need this as a label for the items later when it comes to counting your inventory.

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.