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

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.

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.

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

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.

equipped with AI 🤖, offers over 300 handy features to simplify your tasks.

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:

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:

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:

Best Office Productivity Tools

 🤖 Kutools AI Aide: Revolutionize data analysis based on: Intelligent Execution   |  Generate Code  |  Create Custom Formulas  |  Analyze Data and Generate Charts  |  Invoke Kutools Functions… Popular Features: Find, Highlight or Identify Duplicates   |  Delete Blank Rows   |  Combine Columns or Cells without Losing Data   |  Round without Formula ... Super Lookup: Multiple Criteria VLookup  |   Multiple Value VLookup  |   VLookup Across Multiple Sheets   |   Fuzzy Lookup .... Advanced Drop-down List: Quickly Create Drop Down List   |  Dependent Drop Down List   |  Multi-select Drop Down List .... Column Manager: Add a Specific Number of Columns  |  Move Columns  |  Toggle Visibility Status of Hidden Columns  |  Compare Ranges & Columns ... Featured Features: Grid Focus   |  Design View   |  Big Formula Bar   |  Workbook & Sheet Manager   |  Resource Library (Auto Text)   |  Date Picker   |  Combine Worksheets   |  Encrypt/Decrypt Cells   |  Send Emails by List   |  Super Filter   |   Special Filter (filter bold/italic/strikethrough...) ... Top 15 Toolsets:  12 Text Tools (Add Text, Remove Characters, ...)   |   50+ Chart Types (Gantt Chart, ...)   |   40+ Practical Formulas (Calculate age based on birthday, ...)   |   19 Insertion Tools (Insert QR Code, Insert Picture from Path, ...)   |   12 Conversion Tools (Numbers to Words, Currency Conversion, ...)   |   7 Merge & Split Tools (Advanced Combine Rows, Split Cells, ...)   |   ... and more

Supercharge Your Excel Skills with Kutools for Excel, and Experience Efficiency Like Never Before. Kutools for Excel Offers Over 300 Advanced Features to Boost Productivity and Save Time.  Click Here to Get The Feature You Need The Most...

Office Tab Brings Tabbed interface to Office, and Make Your Work Much Easier

• Enable tabbed editing and reading in Word, Excel, PowerPoint, Publisher, Access, Visio and Project.
• Open and create multiple documents in new tabs of the same window, rather than in new windows.
• Increases your productivity by 50%, and reduces hundreds of mouse clicks for you every day!