Count unique distinct values in a large dataset [UDF]
This article describes how to count unique distinct values in list. What is a unique distinct list? Merge all duplicates to one distinct value and you have created a unique distinct list.
Formulas are sometimes too slow if you work with a lot of data, this article demonstrates a user defined function you can use, however, I highly recommend using a pivot table for this task:
Count unique distinct values using a pivot table
Formula in cell H2:
Excel user defined function
Public Function CountUniqueValues(rng As Variant) As Variant Dim Test As New Collection Dim Value As Variant rng = rng.Value On Error Resume Next For Each Value In rng If Len(Value) > 0 Then Test.Add Value, CStr(Value) Next Value On Error GoTo 0 CountUniqueValues = Test.Count End Function
How to add the user defined function to your workbook
1. Press Alt-F11 to open the visual basic editor
2. Click Module on the Insert menu
3. Copy and paste the above user defined function
4. Exit visual basic editor
5. Select a sheet
6. Select a cell range
7. Type =CountUniqueValues(A1:F3000) into formula bar and press ENTER
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