Converting large time format to decimal in excel

Question

I\'m trying to convert a large time value in excel to a decimal number for hours.

I currently have a column adding up \"Ready time\" for a call centre which is 3545:20:0

Answer 1

Excel counts in days (1 day = 1) so for hours you just multiply by 24, i.e.

=M54*24

format result cell as number with required number of decimals

[the reason your current formula fails is because of DAY function - DAY is day of the month so it fails for you when the time value is >= 32*24 = 768 hours]