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Want to Sum or Count cells that have a specified Fill Color? This can be done with the aid of a Custom Function. A custom function, also called a User Defined Function, is a function that we write ourselves using VBA (Visual Basic for Applications). Here is how
See Also: 2 Separate Functions Here and Excel Sort by Color
First open the Workbook in which you wish to count or sum cells by a fill color. Now go into the Visual Basic Editor via Tools>Macro>Visual Basic Editor (Alt+F11) and then, from within the Visual Basic Editor go to Insert>Module to insert a standard module. Now, in this module, enter in the code as shown below;
Function ColorFunction(rColor As Range, rRange As Range, Optional SUM As Boolean) Dim rCell As Range Dim lCol As Long Dim vResult '''''''''''''''''''''''''''''''''''''' 'Written by Ozgrid Business Applications 'www.ozgrid.com 'Sums or counts cells based on a specified fill color. ''''''''''''''''''''''''''''''''''''''' lCol = rColor.Interior.ColorIndex If SUM = True Then For Each rCell In rRange If rCell.Interior.ColorIndex = lCol Then vResult = WorksheetFunction.SUM(rCell,vResult) End If Next rCell Else For Each rCell In rRange If rCell.Interior.ColorIndex = lCol Then vResult = 1 + vResult End If Next rCell End If ColorFunction = vResult End Function
You can now use the custom function (ColorFunction) like;
=ColorFunction($C$1,$A$1:$A$12,TRUE) to SUM the values in range of cells $A$1:$A$12 that have the same fill color as cell $C$1. The reason it will SUM in this example is because we have used TRUE as the last argument for the custom function.
To COUNT these cells that have the same fill color as cell $C$1 you could use:
=ColorFunction($C$1,$A$1:$A$12,FALSE) or =ColorFunction($C$1,$A$1:$A$12) by omitting the last argument our function will automatically default to using FALSE.
Be aware that the changing of a cells fill color will not cause the Custom Function to recalculate, even if you press F9 (Recalculates the whole Workbook). You will need to either, select the cell and reenter the formula, or go to Edit>Replace and replace = with =, or use Ctrl+Alt+F9
Try also to avoid the use of Application.Volatile as it will not help in this case and only slow down Excel's calculation time.
See Also: 2 Separate Functions Here and Excel Sort by Color
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