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What this calculator does
Find elapsed time between two clock times or dates.
How to use this calculator
- Enter the start and end values, including dates when needed.
- Review the calculation assumptions before using the result.
- The result handles overnight spans clearly.
How to calculate
Choose the calculation mode where available, then enter the values requested by the time duration calculator. Results update immediately.
Worked example
With the example values shown above, the duration is 8h 45m 0s, and the hours is 8.75, and the total minutes is 525.
Understanding your result
The result handles overnight spans clearly.
- Time-zone changes can affect real elapsed time.
- Double-check values and units before calculating.
Frequently asked questions
What does this time duration calculator do?
Find elapsed time between two clock times or dates.
How do I use this time duration calculator?
Enter the start and end values, including dates when needed.
What does the result mean?
The result handles overnight spans clearly.
What should I check before relying on it?
Time-zone changes can affect real elapsed time.
How does it handle a time span that crosses midnight?
Turn on 'end time is on the next day,' or the calculator will detect an end time earlier than the start time and add 24 hours automatically to account for the overnight span.
Can I calculate elapsed time without specific clock times?
Yes — switch to elapsed-values mode and enter the hours and minutes directly for the start and end, rather than using clock times.