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#1
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Subtracting time
Hi all, who knows how to do this? I want to subtract time, but Excel won't take 00:00 - 10:00. Cell format is [hh]:mm. Thanks in advance. -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
#2
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Hi
Excel takes it pretty well, but can't display negative time unless you choose 1904 calendar standard in the Tools Options menu. Note that this action will push existing dates 4 years off. Post back if that is a problem. HTH. best wishes Harald "Pantryman" skrev i melding ... Hi all, who knows how to do this? I want to subtract time, but Excel won't take 00:00 - 10:00. Cell format is [hh]:mm. Thanks in advance. -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
#3
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00.00 is in fact 0 (the number 0) or in time 00 january 1900 0:00 AM
10.00 is in fact 0.416667 ( or 10/24 of 00 january 1900 10.00 AM) The problem is that 00:00 - 10:00 is in fact negative, which excel cannot handle If cell A1 contains 00:00 and A2 contains 10.00 you could use in cell A3 something like = IF(A2 A1; A1 + 1 - A2; A1 - A2) By the way: be sure if you only use time (like in hours) that you not by mistake add 1 (which in fact is 1 day or 24 hrs and not 1 hr!!). JP "Pantryman" schreef in bericht ... Hi all, who knows how to do this? I want to subtract time, but Excel won't take 00:00 - 10:00. Cell format is [hh]:mm. Thanks in advance. -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
#4
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Hi, since this spreadsheet will be used by several users the 1904 solution won't be practical although it indeed works great. The time calculations are not date-dependent so perhaps there is a better solution then adding or subtracting a day? I could for example subtract an additional 4:00 hours, but will that always work? =IF(A2 A1,A1 + 1 - A2 - 4/24,A1 - A2) doesn't work since it will return 11:00 if A1=1:00 and A2=10:00. The result should be the difference between A1 and A2; A1=10:00 A2=0:00 A3=10:00 A1=0:00 A2=0:00 A3=0:00 A1=5:00 A2=6:00 A3=-1:00 A1=6:00 A2=5:00 A3=1:00 thanks so far! -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
#5
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"Pantryman" skrev i melding
... Hi, since this spreadsheet will be used by several users the 1904 solution won't be practical although it indeed works great. Wrong, my friend. 1904 calendar is a workbook property, not an Excel setting. Using a 1904 file is not a problem to anyone. Conflicts appear only when dates are copy-pasted to/from the file, and when remote workbooks link to it. HTH. best wishes Harald |
#6
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Hi Harald, allright. :) The next development for my sheet is the import/export of a txt file containing dates. If this file is imported into a '1904' worksheet from a 'standard' worksheet, what will happen? Also, if a user copy-pastes dates from a 'standard' worksheet into his '1904' worksheet (or vice-versa) will that be a problem? If not, I'll use this solution. Marinus. -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
#7
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Hi Marinus
Import should work fine. Copy-paste should not work fine. So how much of a problem this is depends on its use and how important dates are. This thing has to do with Windows - Macintosh standards. Windows use 1900 calendar by default, Mac 1904. Excel can override a workbook to use to the other standard on both platforms. In a mixed environment this is and has to be a pain. Dates will shift 1462 days -but once you really think you know which direction, it's the other one. But 1462 it is, so once you (and/or macros) know what happens where then it's easy to fix. But as initially stated; Excel has no problems with negative time, just displaying it. If it's for calculations only then it's not a problem except visually. HTH. Best wishes Harald "Pantryman" skrev i melding ... Hi Harald, allright. :) The next development for my sheet is the import/export of a txt file containing dates. If this file is imported into a '1904' worksheet from a 'standard' worksheet, what will happen? Also, if a user copy-pastes dates from a 'standard' worksheet into his '1904' worksheet (or vice-versa) will that be a problem? If not, I'll use this solution. Marinus. -- Pantryman ------------------------------------------------------------------------ Pantryman's Profile: http://www.excelforum.com/member.php...o&userid=15233 View this thread: http://www.excelforum.com/showthread...hreadid=320065 |
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