Time Duration Calculator

Find the hours and minutes between two clock times, including an overnight interval.

8h 30m
elapsed clock time

8.5000 decimal hours · 510 minutes

How to use time duration calculator

  1. Choose a start and end time
  2. Enable next day for an overnight interval
  3. Read the total duration in hours and minutes

Worked example

22:30 to 06:15, next day

7 hours 45 minutes

How the result is calculated

The end time minus the start time gives elapsed clock minutes. Next day adds 24 hours. This clock-only tool does not model time zones or daylight-saving transitions.

Inputs stay in your browser. You can use this tool without joining the waitlist or creating an account.

From a calculation to a daily glance

Keep your next week in view.

Add the start and end as an event in iOS or Google Calendar, then use Weekly Calendar to see the time block beside your other events.

  1. 1Add the events you want to see to your calendar.
  2. 2Enable that calendar in the app.
  3. 3Add Weekly Calendar; use Edit Widget → Design to choose its look.
Get early accessExplore widget designs

Web results do not automatically sync to the app. Setup is manual; calendar events appear through your enabled calendars.

February
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CelebrationWorkshopMeetingProject reviewTeam dinner
Weekly Calendar · example design from the app

Frequently asked questions

How does this time duration work?
The end time minus the start time gives elapsed clock minutes. Next day adds 24 hours. This clock-only tool does not model time zones or daylight-saving transitions.
How can I use the result with Monthly Calendar Widgets?
Add the start and end as an event in iOS or Google Calendar, then use Weekly Calendar to see the time block beside your other events.
Do I need an account to use this tool?
No. The tool works in your browser without an account. Your inputs are not sent to our servers. Downloaded files stay on your device.

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