Set 18 Hours Timer Online
Set timer for 18 Hours directly in your browser. This free online countdown clock counts down from 18 hours to zero and plays a loud alarm when time is up. To start the timer, simply click the Start button above.
Popular Uses
- 18:6 Intermittent Fasting - fast for 18 hours and eat within a 6-hour window for accelerated fat loss and cellular autophagy.
- No-Knead Bread Fermentation - mix no-knead dough in the evening and let it ferment at room temperature for 18 hours overnight.
- 24-Hour Hackathon Phase - track the first 18 hours of a hackathon and know when to transition into final testing and polish.
- Cross-Pacific Flight - some of the longest commercial flights — like Dallas to Sydney — run close to 18 hours gate-to-gate.
- Final Sprint Countdown - count down 18 hours to a critical deadline from the moment you start your last focused push.
Frequently Asked Questions
Does this 18 hours timer make a sound?
Yes. When the countdown reaches zero, the browser plays a short alarm chime. Keep the tab open and your device volume enabled.
Can I use this timer in full screen?
Yes. Use the full-screen button to turn the countdown into a large display for classrooms, workouts, meetings, cooking, or livestreams.
How many seconds is this timer?
This countdown is exactly 64,800 seconds long.
More Timer Durations
Need a different time? Select from our quick preset timers below.
Seconds:
Minutes: