About this 18 hour timer
Ideal for overnight bread proofing, long fermentation processes, and cross-timezone event countdowns.
Press start and the timer shows exactly when your 18 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 18 hour timer for
- 18:6 intermittent fasting
- Overnight bread proofing
- Long fermentation
- Cross-timezone event countdowns
18 hours at a glance
| In minutes | 1,080 minutes |
|---|---|
| In seconds | 64,800 seconds |
| Halfway point | 9 hours |
| Share of a day | 75% |
| Start now and it ends at | — |
How to use the 18 hour timer
- The timer is ready at 18:00:00. 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 18 hours?
18 hours is 1,080 minutes, or 64,800 seconds.
How do I set a 18 hour timer?
Press Start Timer — it is already set to 18:00:00. 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.