Time Duration Calculator
Calculate the duration between two times or dates. Useful for work schedules, planning and tracking time differences.
Mode
Result
Result will appear here.
How it works
This calculator determines the difference between two timestamps and displays the duration in a human-readable format.
All calculations happen locally in your browser.
Examples
Time only Start: 09:30 End: 17:45 Result: Duration: 8 hours 15 minutes Date + time Start: 2026-03-12 09:30 End: 2026-03-13 12:00 Result: 1 day 2 hours 30 minutes
FAQ
Can I calculate overnight time spans?
Yes. In time-only mode, an end time earlier than the start time is treated as the next day.
Can I compare full date and time values?
Yes. Switch to Date + time mode for multi-day duration calculations.
Is this tool safe?
Yes. All calculations happen locally in your browser.