12 Hour Timer
A simple, reliable 12 hours timer. Set it and stay productive.
About the 12 hours timer
Twelve hours for half a day: a fasting window, an overnight soak or a 12-hour shift. Press Start and the 12 hours timer counts down 720 minutes or 43,200 seconds, keeps the remaining time in the tab title, and rings when it reaches zero.
Ideas for a 12 hours timer
- Time a 12-hour intermittent-fasting window
- Soak beans or brine meat overnight
- Count down a 12-hour shift
Why use a timer?
- Stay focusedGreat for work, study or exercise.
- Be more productiveBreak large tasks into smaller chunks.
- Reduce stressA clear end time helps you stay on track.
- Works on any deviceUse it on desktop, tablet or mobile.
12 Hour Timer FAQs
Can I use this for a 16:8 fast?
Start this 12-hour timer at the end of your eating window and follow it with the 4-hour timer, or choose Custom and set 16 hours directly.
How do I use the 12 hours timer?
Press Start and the timer counts down from 12 hours. You can pause and resume at any time, or press Reset to start over. When the countdown reaches zero you’ll see “Time’s up!” and, if sound is on, hear an alarm.
How long is 12 hours?
12 hours is 720 minutes or 43,200 seconds.
Will the timer keep running if I switch tabs?
Yes. The countdown is based on your device clock, so the remaining time stays accurate in a background tab and the tab title shows the time left. Browsers may delay sounds in background tabs and cannot play them if the tab is closed or the device is asleep, so keep the page open for important alerts.
Why didn’t I hear the alarm?
Check that the sound button is on and your device isn’t muted. Browsers only allow sound after you interact with the page, which pressing Start does. Some phones silence web audio when the screen locks.