About this 8 hour timer
Full work day timer and recommended sleep duration target. Perfect for overnight slow-cooking and ferry or flight arrival reminders.
Press start and the timer shows exactly when your 8 hours will be up. It rings at zero, goes full screen for classrooms and kitchens, and remembers where it was if you refresh the page.
What people use a 8 hour timer for
- An 8-hour work day
- A full night's sleep
- Slow cooker on low overnight
- Overnight oats and cold-soak recipes
8 hours at a glance
| In minutes | 480 minutes |
|---|---|
| In seconds | 28,800 seconds |
| Halfway point | 4 hours |
| Share of a day | 33.33% |
| Start now and it ends at | — |
How to use the 8 hour timer
- The timer is ready at 8:00:00. Tap Edit time to change it.
- Press Start Timer (or the space bar). The finish time appears under the digits.
- Press Full screen to fill the screen — handy for classrooms, meetings and kitchens.
- When it reaches zero an alarm plays until you press Stop Alarm.
Keyboard shortcuts
- Space start / pause
- R reset
- F full screen
- M mute
Frequently asked questions
How many minutes are in 8 hours?
8 hours is 480 minutes, or 28,800 seconds.
Can I use an 8 hour timer as a work day timer?
Yes. Start it when you clock in; the finish time is shown under the digits. Add breaks with Pause, or tap +1 min to extend.
How do I set a 8 hour timer?
Press Start Timer — it is already set to 8:00:00. To change the length, tap Edit time, enter hours, minutes and seconds, then press Set. You can also add a minute at any point with +1 min.
Will the timer keep running if I refresh or close the tab?
Yes. The end time is saved in your browser, so reopening this page shows the correct time left. To hear the alarm, keep the tab open and your device's sound on.
Does the timer work on a phone?
Yes. It runs in any modern mobile browser with no app or sign-up, and it asks your phone to keep the screen awake while it runs.