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Work Duration Calculator - Online Hours & Minutes Sum

Calculator Productivity duration hours sum timesheet
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Work Duration Calculator

Add up hours and minutes from multiple work intervals or direct duration inputs. Ideal for timesheets, freelance projects, and shift work.

Time Intervals

Enter start and end times. If end time is earlier than start, it's assumed to be the next day.

Interval total: 0h 0m (0.00 hours)
Direct Durations

Manually add hours and minutes (e.g., overtime, travel time).

Duration total: 0h 0m (0.00 hours)

Combined Work Duration

Sum of all intervals and manually added durations.
0h 0m (0.00 hrs)

Frequently Asked Questions

If your end time is earlier than the start time (e.g., 10:00 PM to 6:00 AM), the tool automatically assumes the end time is the next day and calculates the duration accordingly. You don't need to check any extra box.

Yes, use the "Direct Durations" card on the right side. Just enter hours and minutes (e.g., 2 hours 45 minutes) and click the plus icon. They will be included in the grand total.

Each time interval row has a red trash icon. Click it to delete that entry. For manual durations, each added item shows an X button to remove it. All totals update instantly.

Both formats are shown: hours and minutes (e.g., 12h 30m) and a decimal equivalent (12.50 hours) for easy payroll or billing calculations.

You can subtract break times by splitting your work day into several intervals before and after the break, or by adding a negative duration in the manual durations section (e.g., -30 minutes) if you prefer.
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