time format average

[mhv22]

Hi!, I have a column in table1 , like this:

then I have the same column name and format in 2 different tables : Table2 and Table3 .

I need the average of these 3  columns : (table1[avg.Session.Duration] + table2[avg.Session.Duration]+table3[avg.Session.Duration])/3

but the result must be shown in a card in a time format...I mean... if table1 avg time = 1min 10 seg,  table2 avg time = 1min 20 seg and table3 avg time = 1min 30 seg, I need to show in a card  00:01:20 in time format (hh:nn:ss) ....How could it be done?
Thanks in advance-!!!!

[lukiz84 · Accepted solution]

Hi,

Table1AvgTime = 
    AVERAGEX(Table1, Table1[Avg. Session Duration])

Table2AvgTime = 
    AVERAGEX(Table2, Table2[Avg. Session Duration])

Table3AvgTime = 
    AVERAGEX(Table3, Table3[Avg. Session Duration])

TotalAvg =
    DIVIDE(Table1AvgTime + Table2AvgTime + Table3AvgTime, 3)

[PaulDBrown · Accepted solution]

It would help if you showed the structure of the tabels and model. Ideally you should have dimension tables for fields common to all tables, which would make the calculation straightforward. Having said that, you can try the following measure:

Average Time = 
VAR _T1 = SELECTCOLUMNS('Table 1', "Duration", 'Table 1'[Duration 1])
VAR _T2 = SELECTCOLUMNS('Table 2', "Duration", 'Table 2'[Duration 2])
VAR _T3 = SELECTCOLUMNS('Table 3', "Duration", 'Table 3'[Duration 3])
VAR _FinalTable = UNION(_T1, _T2, _T3)
RETURN
CONVERT(AVERAGEX(_FinalTable, [Duration]), DATETIME)

Sample file attached

EDIT: I just tested @lukiz84 approach and it delivers the same answer, and is of course much simpler!

Average by sum = 
VAR _T1 = AVERAGE('Table 1'[Duration 1])
VAR _T2 = AVERAGE('Table 2'[Duration 2])
VAR _T3 = AVERAGE('Table 3'[Duration 3])
RETURN
CONVERT(DIVIDE(_T1 + _T2 + _T3, 3), DATETIME)

[lukiz84 · Accepted solution]

Hi,

Table1AvgTime = 
    AVERAGEX(Table1, Table1[Avg. Session Duration])

Table2AvgTime = 
    AVERAGEX(Table2, Table2[Avg. Session Duration])

Table3AvgTime = 
    AVERAGEX(Table3, Table3[Avg. Session Duration])

TotalAvg =
    DIVIDE(Table1AvgTime + Table2AvgTime + Table3AvgTime, 3)