Method
The calculator measures elapsed time between two HH:MM values and expresses it in calendar-style and total units.
Date & Time / browser tool
Time Duration Calculator
Find the duration between two times, including overnight.
A clean time-to-time difference with overnight support.
Your inputs stay on your device
Calculate time duration
live resultDuration
4h 30m total
Total hours
Total minutes
Total seconds
Choose each time using AM or PM. If the end time is earlier than the start time, the calculator treats it as the next day.
Context & Reference
How it works
Calculators are most useful when their assumptions are clear. Review these details to better understand the logic behind the results.
How to use it
Enter the start and end time, then compare the duration, decimal hours, minutes, and seconds.
Understand the result
Total hours are useful for timesheets; minutes and seconds show the same duration without unit conversion by hand.
Example
10:00 to 14:30 is 4 hours 30 minutes, or 4.50 total hours and 16,200 total seconds.
Notes
Times are interpreted as a same-day duration unless the end is earlier than the start, in which case an overnight duration is assumed.
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