Calculators toolsUpdated July 2026
Free Time Duration Calculator
Calculate the exact duration between two dates and times directly in your browser.
Free online tool
No signup
Direct download
Browser-first privacy
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Enter both times to calculate the duration.
0Total days
0Total hours
0Total minutes
0Total seconds
Your times stay in your browser.
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How to calculate time duration
- Enter a start date and time.
- Enter an end date and time.
- See the exact elapsed duration, plus total hours, minutes, and seconds.
Why use this private time duration calculator?
Your times stay in your browser. The calculation accounts for the full date and time, so multi-day durations are exact, not estimated.
Common use cases
- Calculate how long a shift or meeting lasted
- Find the exact hours and minutes between a start and end time
- Check total elapsed time across a multi-day event
Frequently asked questions
Is this time duration calculator free?
Yes, with no signup or watermark.
Are my times uploaded?
No. The calculation runs locally in your browser.
What if the end time is before the start time?
The tool swaps them automatically and calculates the same positive duration, with a note that they were reordered.
Does it handle durations longer than 24 hours?
Yes. The breakdown shows days, hours, and minutes, and the totals reflect the full elapsed duration.