How Do I Calculate Time Cards?

I need to know the formula on how to calculate time cards.


Answer:
The easiest way to do this is to convert minutes to fractional hours and next subtract.  Use this chart to convert the minutes to hours.  Once this is done then the procedure is simple subtraction.  Example:  Bob clocks in at 7:58, out at 12:03, in at 12:59, and out at 5:15.  Convert the minutes to their decimal equivalents using the chart:

7:58 = 7.967
12:03 = 12.050
12:59 = 12.983
5:15 = 5.250

Now subtract the clock-ins from the clock outs:
12.050
- 7.967
--------
4.083 hours

5.250
0.983 (treat 12 as not anything for purposes of subtraction)
--------
4.267 hours

Total time: 8.35 hours

If you need an actual formula to convert minutes into a fractional hour, use this:

Faction = minutes / 60
Don't be silly.  7:56 a.m. Clock-in and 5:23 p.m. Clock out is nominally an 8-5 shift which is a standard 8-hour shift with an unpaid 1-hour lunch.  So just count the hours first and traffic with the minutes separately.  So, you have 8 full hours total.  Then you have 4 minutes back the shift and 23 minutes after the shift for 27 extra minutes.  Voila!  8hrs and 27 minutes.

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