Formula for Share Point

Question

Hi guys,
I have 2 problems with the Formulas and calculations in Share Point.
1. I want to calculate time, that has been used for work on a location, if I use the preconfigured date/time calculation and use the formula: End Time - Start Time, the hours are ok, but the date is always 31.12.1899, and dont get it why.
Now I have used the formula =TEXT(([End Time] - [Start Time]); "hh:mm"), the time is calculated and displayed ok, but if I do it for more than 24 hours, then those 24 hours are not included in the result. Can some help me with that?
I have tried many other formulas, but there is always a sintax error:
=CONCATENATE(IF(INT(([End Time]-[Start Time])*24)>1,INT(([End Time]-[Start Time])*24)&" hours",IF(INT(([End Time]-[Start Time])*24)=1,INT(([End Time]-[Start Time])*24)&" hour","")),IF(MINUTE([End Time]-[Start
Time])>0,MINUTE([End Time]-[Start Time])&" minutes",""))
I have tried that formula above, and translate it to german (I thought that could be the problem) because we use a german Share Point version. But not in german not in the englisch one works. I always get "syntax" error and thats it.
I have put in the right values instead of "end and start" time.
2. I to have the Weeks Numbers to be seen in the tasks overview. So when I put in the starting date, the Week number in the year should be displayed.
I used the following code, but it hasn't work at all:
=IF(Datum<>"",(ROUND((Datum-DATE(YEAR(Datum+3-MOD(Datum-2,7)),1,MOD(-2,7)-9))/7,0)),"")
But it also comes the syntax error message.
I would be very glad if anyone could help me with those formulas.
Best regards,
Ziga

Answer 1

Hi Ziga,
I assume the column of start date is named by c1 and the column of end date is named by c2. Please see the following formulas:
Calculate the hours between two date:  =INT((c2-c1)*24)
Calculate the minutes between two date:  =INT((c2-c1)*1440)
Calculate the week number of month:  =((INT((c1-DATE(YEAR(c1),1,1)+(TEXT(WEEKDAY(DATE(YEAR(c1),1,1)),"d")))/7)+1)-(INT(((MONTH(c1)&"/1/"&YEAR(c1))-DATE(YEAR((MONTH(c1)&"/1/"&YEAR(c1))),1,1)+(TEXT(WEEKDAY(DATE(YEAR((MONTH(c1)&"/1/"&YEAR(c1))),1,1)),"d")))/7)+1)+1)&"
"&"Week"
Calculate the week number of  year:  =INT((c1-DATE(YEAR(c1),1,1)+(TEXT(WEEKDAY(DATE(YEAR(c1),1,1)),"d")))/7)+1
Regards,
Rebecca Tu
TechNet Community Support