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3D sum multiple worksheets

Excel formula: 3D sum multiple worksheets
Generic formula 

To sum the same range in one or more sheets, you can use the SUM formula with a special syntax called a "3d reference". In the example shown, the formula in D6 is:


The syntax for referencing a range of sheets is a built-in feature and works a bit like a reference to a range of cells. For example


Means: cell A1 from Sheet1 to Sheet3.

In the example shown:


Will sum cell D6 from Week1 to Week5, equivalent to:


In this workbook, the sheets Week1 through Week 6 all look exactly like this:

Week1 through Week6 all have the same structure

Other examples

You can use 3D references in other formulas as well. For example:

=COUNTA(Sheet1:Sheet5!A1) // count values in A1
=AVERAGE(Sheet1:Sheet5!A1) // average values in A1
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