.....if your sheets were ordered (from left to right at the bottom) as Sheet1, Sheet3, Sheet2, the above
formula will ignore Sheet2.....<<
Good point. Following is for future reference ......
If you don't want to drag Sheet2 before Sheet3, you can set up "Firstsheet" to the left of Sheet1 and "Lastsheet" to the right of Sheet2. Firstsheet and Lastsheet are blank and can be hidden.
Then change the formula to =AVERAGE(Firstsheet : Lastsheet!A1:C10)
(Note: There are no spaces before and after the colon. I included the spaces to make it legible in this post.)
With the above set up and formula, the sheets between Firstsheet and Lastsheet can be in any order. You can even insert Sheet4, Sheet9, Sheet99 in between Firstsheet and Lastsheet without changing the formula. All six sheets will be averaged.
Epinn
Hi Robin,
The formula that Epinn provided you will work across sheets. Say you
have Sheet1, Sheet2, Sheet3, then the following formula will average
A1:C10 of all three sheets:
=AVERAGE(Sheet1:Sheet3!A1:C10)
One thing to note, however, is that if your sheets were ordered (from
left to right at the bottom) as Sheet1, Sheet3, Sheet2, the above
formula will ignore Sheet2. The formula to span sheets spans them as
they are ordered in the workbook. I hope that makes sense.
The quick info feature I described above only works on the active
worksheet, as Biff said.
HTH,
Ken Puls, CMA - Microsoft MVP (Excel)
www.excelguru.ca