Hi
I think we need a little more explanation on how 6:30 is entered/stored/displayed.
However, if the literal 6:30 is entered in, say, cell A1, then it is converted to a time (actual value 0.270833333333333) but displayed as 06:30.
If this is the case then in another cell type = A1*24 and format it as General or Number it displays as 6.5.
Is that any help at all ??
MTB