Set 16 Hours Timer Online
Set timer for 16 Hours directly in your browser. This free online countdown clock counts down from 16 hours to zero and plays a loud alarm when time is up. To start the timer, simply click the Start button above.
Popular Uses
- 16:8 Intermittent Fasting - the most popular fasting protocol: fast for 16 hours and eat within a structured 8-hour window.
- Waking Day Tracker - most people are awake for 16 hours — use the timer to optimize how each productive hour is spent.
- Overnight Cooking Project - smoke a brisket, slow-roast a lamb shoulder, or ferment kimchi through a 16-hour overnight cycle.
- Cross-Continental Flight - track ultra-long flights like New York–Singapore or London–Sydney that run 16 or more hours.
- Product Launch Countdown - count down exactly 16 hours to a website launch, app release, or brand announcement going live.
Frequently Asked Questions
Does this 16 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 57,600 seconds long.
More Timer Durations
Need a different time? Select from our quick preset timers below.
Seconds:
Minutes: