Tracking time in a timesheet calculator seems simple enough, but mistakes often occur because everything is represented in hours, not minutes. 15 minutes on a timesheet equates to a quarter of an hour, so it should be entered as .25. Since 30 minutes is half an hour, employees should enter .5 and since 45 minutes is three-quarters of an hour it equates to .75 on a timesheet. The above examples are straightforward and easy enough. But here’s where some math is required. For 50 minutes, you’ll divide 50 by the 60 minutes in an hour to determine what number to enter in the timesheet calculator (.83). Luckily, with QuickBooks time card calculator, employees simply enter a start time and an end time and the automated software does the rest, so your timesheets are error-free.