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## Create an average based on 4 weeks running totals

I want to create an average based on 4 weeks

I have the following weeks and totals:

the total for weeks 1, 2, 3, 4 is 160

the total for weeks 2, 3, 4, 5 is 195

the total for weeks 3, 4, 5, 6 is 182

the total for weeks 4, 5, 6, 7 is 181

the total for weeks 5, 6, 7, 8 is 174

the total for weeks 6, 7, 8, 9 is 157

the total for weeks 7, 8, 9, 10 is 176

the total for weeks 8, 9, 10, 11 is 201

-- based on if I only have 8 - 4 week periods-- I want to create a calculation that averages the totals above or

160 +195+182+181+174+157+176+201=1426 / 8 = 178.25

I need a calulation that will total the four week periods (like above) then create the average.  Thank you

1 ACCEPTED SOLUTION
Super User

You could do the grouping into sets of 4 weeks and then average those sums but this should be mathematically equivalent to taking the weekly average for all weeks and multiplying by 4.

If your data is at a weekly granularity already, then this should be as simple as

``Avg 4 Weeks = 4 * AVERAGE ( Table1[Total] )``

If not, then you'll need something more like this:

``Avg 4 Weeks = 4 * AVERAGEX ( VALUES ( Table1[WeekNum] ), [SumTotalMeasure] )``
Super User

You could do the grouping into sets of 4 weeks and then average those sums but this should be mathematically equivalent to taking the weekly average for all weeks and multiplying by 4.

If your data is at a weekly granularity already, then this should be as simple as

``Avg 4 Weeks = 4 * AVERAGE ( Table1[Total] )``

If not, then you'll need something more like this:

``Avg 4 Weeks = 4 * AVERAGEX ( VALUES ( Table1[WeekNum] ), [SumTotalMeasure] )``

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