Date and Time Duration Calculator
Measure the exact elapsed duration between two dates and times in real days, hours, minutes, and seconds.
Result
Complete the fields to see the result.
The calculation runs locally in your browser.
Actual duration between two instants
This calculator compares two date-times and reports elapsed days, hours, minutes, and seconds. Unlike civil-date difference, every elapsed hour contributes to the result.
Order and local time
Datetime-local controls represent the browser's selected local time. Reversed dates produce a positive duration with an explicit note.
Frequently asked questions
How is this different from Days Between Dates?
This tool includes actual hours and minutes; Days Between Dates compares calendar dates.
Can dates be reversed?
Yes. It returns a positive distance and notes the reversed order.
Does one displayed day equal 24 hours?
Yes, here a duration day means 24 actual elapsed hours.