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Set an alarm for 12 hours

Timer: 12 hours

12:00:00

Keep this tab open and your volume on. Allow notifications to get an alert even when the tab is in the background.

Run more timers

Add as many timers as you need. Each one rings on its own.

    12 hours in other units

    Seconds43,200
    Minutes720
    Hours12

    What a timer for 12 hours is good for

    Slow cooking, parking meters, screen-time limits and long tasks.

    Questions about 12 hours

    How do I set a timer for 12 hours?

    Press Start. The timer counts down 12 hours and plays your chosen sound at zero. You can pause or reset it at any point.

    How many seconds are in 12 hours?

    12 hours is 43,200 seconds, or 720 minutes.

    Does the timer keep running if I switch tabs?

    Yes. The timer tracks the finish time, so it stays accurate in a background tab. Allow notifications to get an alert when it ends.

    12 hours

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