About this 9 hour timer
A free 9-hour countdown timer that starts with one click.
Press start and the timer shows exactly when your 9 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 9 hour timer for
- A 9-to-6 work day including lunch
- A long night's sleep
- Overnight dough fermentation
- Long-haul flights
9 hours at a glance
| In minutes | 540 minutes |
|---|---|
| In seconds | 32,400 seconds |
| Halfway point | 4 hours 30 minutes |
| Share of a day | 37.5% |
| Start now and it ends at | — |
How to use the 9 hour timer
- The timer is ready at 9:00:00. 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 9 hours?
9 hours is 540 minutes, or 32,400 seconds.
How do I set a 9 hour timer?
Press Start Timer — it is already set to 9:00:00. 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.