Date, Time & Productivity
Time Duration Calculator
Measure the exact time between two dates and times.
Date, Time & Productivity
Working Hours Calculator
Total shift hours and unpaid breaks, including optional overnight shifts.
1–366 shifts. Breaks must be whole minutes and cannot exceed the shift. Equal start/end times mean zero hours. No dates, timezone/DST adjustments, overtime rules or payroll calculations.
Good to know
Frequently asked questions
How do I use it?
Enter your shifts: start, end, unpaid break minutes, adjust the options and press “Calculate hours”. Check the result, then copy or download it.
How does it work?
Uses exact minute arithmetic for each 24-hour HH:MM shift, subtracts unpaid breaks and sums the results. End times earlier than start times add one day only when overnight shifts are enabled.
Are there limitations?
1–366 shifts. Breaks must be whole minutes and cannot exceed the shift. Equal start/end times mean zero hours. No dates, timezone/DST adjustments, overtime rules or payroll calculations.
Is my data uploaded?
No. Everything is processed in your browser and nothing is sent to a server. No account is needed.
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