DATE & TIME TOOL
Time Duration Calculator
Find the exact duration between two times of day, including overnight spans.
Duration
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In minutes / hours
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About this tool
Find the exact duration between two times of day — for shifts, meetings, workouts, or anything else timed in hours and minutes. Check "Ends the next day" for spans that cross midnight, like an overnight shift.
Frequently asked questions
- What if the end time is earlier than the start time?
- Without "Ends the next day" checked, an earlier end time shows a hint asking you to fix the order. With it checked, the calculation correctly wraps past midnight instead.
- Does this handle exact 24-hour spans?
- Yes — matching start and end times with "Ends the next day" checked correctly shows a full 24-hour duration rather than zero.
- Can I use this for dates, not just times of day?
- This tool is specifically for time-of-day spans; for calculating days between two calendar dates, use the Days Between Dates calculator instead.