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
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
Enter times in HH:MM (24-hour) format. Overnight durations are automatically detected.
Useful context
How it works
Use the calculator first, then scan the details below when you want more context about the inputs, result, or assumptions.
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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