Showing results for 
Search instead for 
Did you mean: 

Fabric is Generally Available. Browse Fabric Presentations. Work towards your Fabric certification with the Cloud Skills Challenge.

Helper I
Helper I

12 Month Rolling Average (Fiscal Calendar) Calculation



I'm trying to recreate the following formula from Excel in DAX:


The 12 month rolling avergae formula is: 






Column E is Total X

Column D is Total Y




So it's basically summing the last 53 rows of the 'Total X' column divided by last 53 rows of 'Total Y' column * 100000.


I'm using the company calendar which is fiscal periods so cannot use any of the inbuilt date/time intelligence functions or the quick measures. My calendar looks like this:




Please could someone explain how I can create the same formula in dax...It's driving me mad!

Helper I
Helper I

@amitchandak thank you for this, my figure is still not quite matching up with the excel spreadsheet. I think the fact the column is called '12 month AFR rolling average' might be a bit confusing because the calculation is actually using the last 53 weeks. 


So for example the 12 month rolling average for W/C 17/01/2021 is 16.3 which is calculated by adding the data starting from W/C 19/01/2020 to W/C 17/01/2021 (53 weeks)


When using your first measure the figure I get is 17.0 for W/C 17/01/2021 and the second measure gives 17.4


Thank you for your help with this!

@Valley_Girl , you do have week option in period, check or you can use 364 days etc 


or you can have column like

new columns
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
Week Rank = RANKX(all('Date'),'Date'[Year Week],,ASC,Dense) //YYYYWW format


use WEEKDAY('Date'[Date],1) for sunday week


Last 53 weeks = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]>=max('Date'[Week Rank])-53 && 'Date'[Week Rank]<=max('Date'[Week Rank])))

Super User
Super User

@Valley_Girl , Assuming month are not standard, Create a Rank column in date table on period start or yyyypp


Period Rank = RANKX(all('Period'),'Period'[year period],,ASC,Dense)


Example rolling measure 


rolling = CALCULATE(sum('order'[Qty]),filter(ALL('Date'),'Date'[Period Rank]>=max('Date'[Period Rank])-12 && 'Date'[Period Rank]<=max('Date'[Period Rank])) )




rolling = CALCULATE(Averagex(Values('Date'[Year period]) ,calculate(sum('order'[Qty]))),filter(ALL('Date'),'Date'[Period Rank]>=max('Date'[Period Rank])-12 && 'Date'[Period Rank]<=max('Date'[Period Rank])) )


This Period = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Period Rank]=max('Date'[Period Rank])))
Last Period = CALCULATE(sum('order'[Qty]), FILTER(ALL('Date'),'Date'[Period Rank]=max('Date'[Period Rank])-1))

Helpful resources

PBI November 2023 Update Carousel

Power BI Monthly Update - November 2023

Check out the November 2023 Power BI update to learn about new features.

Community News

Fabric Community News unified experience

Read the latest Fabric Community announcements, including updates on Power BI, Synapse, Data Factory and Data Activator.

Dashboard in a day with date

Exclusive opportunity for Women!

Join us for a free, hands-on Microsoft workshop led by women trainers for women where you will learn how to build a Dashboard in a Day!

Power BI Fabric Summit Carousel

The largest Power BI and Fabric virtual conference

130+ sessions, 130+ speakers, Product managers, MVPs, and experts. All about Power BI and Fabric. Attend online or watch the recordings.

Top Solution Authors
Top Kudoed Authors