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.

If you are unfamiliar with inputting formulas into Microsoft Excel, the much simpler way to get the number of unique values in an Excel column is through a filter.

There are a few ways to count the number of items in an Excel list, depending on the data you have. One way is using the COUNTIF function.

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.

Microsoft Excel allows you to crunch massive quantities of data easily through the use of functions. Sometimes you need to know the number of actual data points without counting blank cells.

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.

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.