Time Duration Calculator
Enter a start time and end time to instantly calculate the duration in hours, minutes, and seconds — overnight spans included.
Enter Times
Hour
Minute
Second
Hour
Minute
Second
Overnight span
End time is on the next calendar day
Duration
Enter start and end times, then click Calculate.
00:00:00
hh : mm : ss
0
Hours
0
Minutes
0
Seconds
Total minutes
0
Total seconds
0
Decimal hours
0.00
Summary
Enter a start time and end time to instantly calculate the duration in hours, minutes, and seconds — overnight spans included.
How it works
- Enter your start time using the time input or type it directly.
- Enter your end time in the same way.
- Toggle the "Overnight span" switch if the end time is on the next day.
- Click "Calculate" to see the full breakdown of hours, minutes, and seconds.
- Use "Copy Result" to copy the formatted duration to your clipboard.
Use cases
- Calculate shift length for payroll or timesheets.
- Find out how long a meeting or event lasted.
- Measure study or work sessions.
- Determine the runtime of a video or audio segment.
- Figure out the gap between an appointment and a deadline.
- Track overnight jobs, flights, or travel durations.
- Verify logged hours in a time-tracking app.
- Convert raw start/end timestamps into a readable duration.
Frequently Asked Questions
Last updated: 2026-06-10 ·
Reviewed by Nham Vu