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How to count unique/duplicate dates in an Excel column?

In a list of dates with some duplicate dates and unique dates, and for some purposes, you want to count the unique dates or the duplicates dates only in the list, how could you quickly count them instead of manual counting? This tutorial can tell you the tricks.

Count unique dates in a column with formula

Count and color unique/duplicate date in a column with Kutools for Excel


arrow blue right bubble Count unique dates in a column with formula


In Excel, there is a formula can help you to count all unique dates including the first duplicate ones in a list.

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Select a blank cell, for instance, B2, and type this formula =SUMPRODUCT(1/COUNTIF(A2:A22,A2:A22)) in to it, and press Enter, you can get the counting result.

doc count unique date 1
doc count unique date 2

In above formula, A2:A22 is the range you want to count unique dates from, you can change it as you need.


arrow blue right bubble Count and color unique/duplicate dates in a column with Kutools for Excel

If you want to count and color the unique dates excluding the first duplicate ones, or count the duplicate dates, you can use Kutools for Excel’s Select Duplicate & Unique Cells utility to help you solve it.

Kutools for Excel: with more than 300 handy Excel add-ins, free to try with no limitation in 60 days.

After free installing Kutools for Excel, please do as below:

1. Select the range you want to count unique or duplicate dates, and click Kutools > Select > Select Duplicate & Unique Cells. See screenshot:

doc count unique date 3

2. In the Select Duplicate & Unique Cells dialog, check the option as you need in Rule section, and then if you want to color the selected cells, check Fill backcolor or Fill font color checkbox to select a color as you need in Processing of results section. See screenshot:

doc count unique date 4

3. Click Ok, and a dialog pops out to tell you the counting result, and at the same time, the selected cells are colored. See screenshot:

doc count unique date 5

Click here to free download Kutools for Excel


doc KTE


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