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How to average last 5 values of a column as new numbers entering?

In Excel, you can quickly calculate the average of last 5 values in a column with the Average function, but, from time to time, you need to enter new numbers behind your original data, and you want the average result will be changed automatically as the new data entering. That is to say, you would like to have the average always reflect the last 5 numbers of your data list, even when you add numbers now and then.

Average last 5 values of a column as new numbers entering with formulas

arrow blue right bubble Average last 5 values of a column as new numbers entering with formulas

The following array formulas may help you to solve this problem, please do as follows:

Enter this formula into a blank cell:

=IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data") (A:A is the column which contains the data you used, A1:A10000 is a dynamic range, you can expand it as long as your need, and the number 5 indicates the last n value.), and then press Ctrl + Shift + Enter keys together to get the average of last 5 numbers. See screenshot:

doc-average-last-5-1

And now, when you input new numbers behind the original data, the average will be changed as well, see screenshot:

doc-average-last-5-2

Note: If the column of cells contain 0 values, you want to exclude the 0 values from your last 5 numbers, the above formula will not work, here, I can introduce you another array formula to get the average of last 5 non-zero values, please enter this formula:

=AVERAGE(SUBTOTAL(9,OFFSET(A1:A10000,LARGE(IF(A1:A10000>0,ROW(A1:A10000)-MIN(ROW(A1:A10000))),ROW(INDIRECT("1:5"))),0,1))), and then press Ctrl + Shift + Enter keys to get the result you need, see screenshot:

doc-average-last-5-3

Related articles:

How to average every 5 rows or columns in Excel?

How to average top or bottom 3 values in Excel?

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Paul
Paul
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=IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data")

Does not work for me.

Here is my version:
=IF(COUNT(C:C),AVERAGE(INDEX(C:C,LARGE(IF(ISNUMBER(C2:C10000),ROW(C2:C10000)),MIN(5,COUNT(C2:C10000))))):C10000)

The error I get is: Wrong data type.
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skyyang
skyyang     Paul
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Hello, Paul,
Do you press the Ctrl + Shift + Enter keys together after pasting the above formula?
Please try it.
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Don Helgeland
Don Helgeland     skyyang
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I tried the formual =IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data") then did COMMAND RETURN on my Mac and the formula worked but it didn't average the lowest 10 of the last 20 values correctly.I would like to average the lowest 8 values of of the last or most recent 20 values in a dynamic range as I enter a new value every day. Any help would be greatly appreciated!
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skyyang
skyyang     Don Helgeland
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Hello, Don,To solve your problem, please apply the below array formula:=AVERAGE(SMALL(IF((A1:A10000<>0)*(IF(ISNUMBER(A1:A10000),ROW(A1:A10000))=LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20})),A1:A10000),{1,2,3,4,5,6,7,8}))
After inserting the formula, please press 
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Don Helgeland
Don Helgeland     skyyang
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Thank you! When I verify I do not get the correct value. My last 20 values are as follows: 0.0    0.2    8.9    2.9    8.1    8.1    8.1    5.3    8.1    0.4    6.6    -0.5    0.2    9.0    9.0    5.1    3.6    1.9    4.6    1.3Your array gives an average of 1.2 for the 8 lowest valuesMy average is 0.8 for the 8 lowest values.Not sure what went wrong?
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Don Helgeland
Don Helgeland     Don Helgeland
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I think it doesn't average zero. I tired <=> and that is not a solution.
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skyyang
skyyang     Don Helgeland
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Hi, Don,Yes, as you said, the formula exclude the 0s when averaging, if you want to average with 0s, please apply the below formula:=AVERAGE(SMALL(IF(ISNUMBER(A1:A10000)*(IF(ISNUMBER(A1:A10000),ROW(A1:A10000))=LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20})),A1:A10000),{1,2,3,4,5,6,7,8}))
Please remember to press Ctrl + Shift + Enter keys together.
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J.Tombo
J.Tombo
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Hello, I would like average the lowest 10 values of the last 20 added to a set of data. After reading this one here and another one of your examples, I now know how to average the lowest 10 values of 20 and how to grab only the last 20 values for averaging, but I need to combine them so I only average the lowest 10 values of the last and or most resent 20 add to the set of data. Please let me know if you can help, thank you JT.
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Steve
Steve
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25% x (r) = (n), rounded up to the next whole number = (a) then the top (a) race points are averaged together to get the total race points (p) for the week.

Example: 25%x9 = 2.25 rounded up to 3. Top 3 races of the 9 races are averaged to get the total points for the week.

How do I create a formula in excel for this?
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Yves
Yves
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Bonjour,

La formule ne fonctionnant pas chez moi, et ayant un fort besoin de l'avoir, j'ai creusé l'affaire.
Je ne comprenais pas pourquoi utiliser la fonction LARGE qui n'est là que si on cherche la plus grande valeur d'une colonne, qui n'est pas forcément dans les 5 derniers.

Donc, voici une formule simple (en français, mais vous trouverez facilement l'équivalent anglais) :
=MOYENNE(INDEX(A2:A1000;NB(A2:A1000)-5+1):A1000)
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MandyZhou
MandyZhou     Yves
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Hello Yves,

You can use the simple formula: =AVERAGE(OFFSET(A1,COUNT(A:A),0,-5)). Please have a try. Please see the attached picture.

Sincerely,
Mandy
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