Try one of these:
For a time in A1
This one rounds to the NEAREST multiple of 15 minutes
B1: =MROUND(A1,1/24/4)
If this function is not available, and returns the #NAME? error, install and
load the Analysis ToolPak add-in.
or
This one does the same thing as the MROUND function, but doesn't need the
ATP installed:
B1: =ROUND(A1*(24*4),0)/(24*4)
or
This one rounds UP to the NEXT multiple of 15 minutes
B1: =CEILING(A1,1/24/4)
Note:
24*4 equals the number of 15 min intervals in a day
1/24/4 equals on fourth of one 24th of a day
Does that help?
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Regards,
Ron
XL2002, WinXP