Hours Calculator
When you need to check hours, the Hours Calculator keeps the date and time arithmetic in one place. Review the input format before accepting the answer.
If the end time is earlier than the start time, it is treated as the next day (an overnight shift).
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How it works
The start and end times are converted to minutes. If the end is earlier than the start, the calculator assumes the shift runs past midnight and adds a day. It then subtracts any break to give the worked time, shown in hours and minutes and as a decimal number of hours.
How to use the Hours Calculator
Enter the values requested by the tool and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options. Keeping a note of the original figures makes the calculation easier to check later.
Dates, daylight saving and time zones can affect a result. Check the displayed inputs if the period crosses a calendar or location boundary.