Custom Date & Time format

[Guest]

I want to copy a date field "10/18/2005 8:05" into another column and change
it to a number (minutes) so 8:05 (8 hours & 05 minutes) reads as 485 minutes
- and I would take the 485 and divide it by another value to yield gallons
per minute.

The date field is downloaded from another source so I cannot change it's
format direcetly. How do I change it after I copy it into a number format?

 

[Guest]

easiest would be to either add a formula to an adjacent cell or just add the
minute calculation to your gallon per minute formula. Do you want/need to
see minutes or just get answer?
test:
place this formula in B3 and format cell as number
= 60 * Hour(A3) + Minute(A3)
In Cell A3
= Now()
B3 should give the minute of the day of the last recalculation

 

[JE McGimpsey]

One way:

Dates in XL are stored as integer offsets from a base date, and times
are added/stored as fractional days, so if your date field is in cell
A1, use

=MOD(A1,1)*1440

to get minutes (24 hr/day * 60 min/hr = 1440 minutes/day)

 

[Guest]

Worked like a charm - thank you very much.

easiest would be to either add a formula to an adjacent cell or just add the
minute calculation to your gallon per minute formula. Do you want/need to
see minutes or just get answer?
test:
place this formula in B3 and format cell as number
= 60 * Hour(A3) + Minute(A3)
In Cell A3
= Now()
B3 should give the minute of the day of the last recalculation