# (Excel examples for Beginners)

In this end-to-end excel example, you will learn – Excel formula for Beginners – How to Average last 5 values in Excel.

### Generic formula

`=AVERAGE(OFFSET(A1,COUNT(A:A),0,-N))`

### Explanation

To average the last 5 data points, you can use the AVERAGE function together with the COUNT and OFFSET functions. You can use this approach to average the last N data points: last 3 days, last 6 measurements, etc. In the example shown, the formula in F6 is:

`=AVERAGE(OFFSET(C3,COUNT(C:C),0,-5))`

Note: a negative value for height won’t work in Google sheets. See below for more information.

### How this formula works

The OFFSET function can be used to construct dynamic rectangular ranges based on a starting reference and given rows, columns, height, and width.  The rows and columns arguments function like “offsets” from the starting reference. The height and width arguments (both optional), determine how many rows and columns the final range includes. For this example, OFFSET is configured like this:

• reference = C3
• rows = COUNT(A:A)
• cols =  0
• height = -5
• width = (not provided)

The starting reference is provided as C3 the cell above the actual data. Since we want OFFSET to return a range originating from the last entry in column C, we use the COUNT function to count all values in column C to get the required row offset. COUNT counts only numeric values, so the heading in row 3 is automatically ignored.

With 8 numeric values in column C, the OFFSET formula resolves to:

`OFFSET(C3,8,0,-5)`

With these values, OFFSET starts at C3, offsets 8 rows to C11, then uses -5 to extend the rectangular range up “backwards” 5 rows to create the range C7:C11.

Finally, OFFSET returns the range C7:C11 to the AVERAGE function, which computes the average of values in that range.

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Excel formula for Beginners – How to Average last 5 values in columns in Excel

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