Time Duration Calculator
The time between two dates and times, a time plus or minus a duration, or the total of a list of durations.
Your times
Filled in with example values. Replace them with your own.
Wall-clock times; a daylight saving clock change in between is not taken into account.
Results update as you type.
Result
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Fill in the remaining fields to see your result.
How the time duration calculator works
Pick what you need: the time between two moments, a date and time plus or minus a duration, or the total of a list of durations. Results are shown in days, hours and minutes, as h:mm, and in decimal hours and minutes.
The method
Duration = (end date and time) − (start date and time)
1 day = 24 hours = 1,440 minutes
Decimal hours = hours + minutes ÷ 60
Worked examples
- From 22:30 to 07:15 the next day: 1 h 30 min to midnight + 7 h 15 min = 8 hours 45 minutes (8.75 hours).
- Tuesday 09:00 plus 2 days 20 hours 30 minutes is Friday 05:30.
- 1:30 + 2h 45m + 50m = 90 + 165 + 50 = 305 minutes = 5 hours 5 minutes.
Frequently asked questions
How do I work out a night shift that ends the next day?
Set the end date to the following day. From 22:30 to 07:15 the next morning is 8 hours 45 minutes. If both dates are the same, an end time earlier than the start time is flagged as a mistake.
How do I turn hours and minutes into decimal hours?
Divide the minutes by 60 and add them to the hours: 8 hours 45 minutes is 8 + 45 ÷ 60 = 8.75 hours. The result shows both forms.
Does it allow for daylight saving time?
No. It counts wall-clock time, so across a night when the clocks change, the real elapsed time is one hour more or less than shown.
How should I type durations to add up?
Any of these work: 1:30, 2h 45m, 1.5h, 3h, or a number of minutes such as 50. Separate them with commas or new lines.