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Formula To Ignore Zeros In Averages?
I have columns running left to right with the 12 months listed as the main header of each. I want to have a column on the far right that shows our average month's sales based on each months totals we go. RIght now it is May, but the simple AVG formula also counts JuneDecember sicne they have zeros in them. So, instead of it dividing the total by 5, it is dividing by 12, thus giving a false average. I already understand that I can simply delete the zeros. However, those zeros are there based on the formula with that cell which will total that column's sales totals based on the cells below (Children).
In short, I just need a way to tell the formula to ignore anything showing a zero and then divided by the cells containg actual sales numbers.
So, what would you add to this is formula below to accomplish this?
=AVG(Jan8:Dec8)
Thanks!
Comments

Hi Brian! This is possible by creating a formula that will sum the range of numbers and divide that number by a count of the cells subtracted by a count of the cells that contain 0.
Here is what the formula would look like if your column names and range are January  December (and in row 3):
=(SUM(January3:December3)) / ((COUNT(January3:December3))  (COUNTIF(January3:December3, 0)))
This formula will divide the total sum by the number of cells that do not contain a 0.

Yes, it worked! Thanks so much Travis.

By the way, some lines will have zeros in almost all months until later in the year. It looks like this particular formula requires at least one cell to contain a number greater than zero. Otherwise, it shows #DIVIDE BY ZERO. Any addtions I could add to the formula to force it to show a zero in that cell in place of that message?

To avoid seeing the error codes because there is no data to crunch, eg Divide by Zero you can insert and IF statement. Detailed explanations in the "formula errors section of the help pages with workarounds for most of these.

Brian try this formula which will first check if the count is the same as the count if 0. If these are the same, the formula will produce a "0". If they are not the same, it will move on the formula I provided above.
=IF((COUNT(January3:December3)) = (COUNTIF(January3:December3, 0)), "0", SUM(January3:December3) / ((COUNT(January3:December3))  (COUNTIF(January3:December3, 0))))

Thanks again!
By the way, how would I make it display the zero like this: $0.00 rather than this: 0.
When I try to add "Currency Format" using the control panel to the left, it won't change. I figured something in this formula must be overrriding it.

Travis, any ideas on my question above?

Brian, thanks for following up! The 0 is formatted as text (and cannot be currency) because I added quotes around the 0 (not sure why I did that! ). If you remove the quotes, it will be formatted as a number and then will be displayed as $0.00. Here is the new formula with the change:
=IF((COUNT(January3:December3)) = (COUNTIF(January3:December3, 0)), 0, SUM(January3:December3) / ((COUNT(January3:December3))  (COUNTIF(January3:December3, 0))))

Of course, in the end it's always something simple and easy in these instances. All fixed now. Many thanks!
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