
Formula date time calc hours code#
With this number format code you can represent any number as a time difference. Add days, hours, minutes and seconds working from smallest unit of time to largest. An easy example would be to use :MM:SS (am/pm makes no sense for time differences) which tells the number formatter that you don't want to calcuate times modulo 24 hours. Click a cell where you want to locate the calculated result, and then, click Kutools > Formula Helper > Formula Helper, see screenshot: 2. In your case you want to show negative time (or time differences) so you want to represent negative numbers like -0.1 as -02:24:00 which requires you to adapt the number format code. Experiment with some additional formulas: in A4 enter A324 to calculate the hours, in A5 enter A460 for the minutes, and in A6 enter A560 for seconds. The number format code that corresponds to 12:00:00 AM is HH:MM::SS AM/PM which says that the time should be calculated modulo 24 hours and AM/PM applied automatically. The number of days between today's date and the specified date is displayed in cell A3. The second important thing to understand is that the number format code tells you how your value is interpreted. To calculate total work hours between two dates and times, you can use a formula based on the NETWORKDAYS function. Now if you add the default time format you'll get something like 12:00:00 AM (for an en-US locale, for other locates the representation looks different). The value 1 represents 24 hours when formatted as time or one day past the zero date (can be changed in the options).


The important part for working with time values as well as dates in LibreOffice (same is true for Excel) is to understand that these are just normal numbers with a special number format.
