3 hours timer
3 hours countdown with alarm.
Timer
03:00:00
Quick presets
Advertisement
This timer is set to 3 hours. That is 10,800 seconds, 180 minutes, 10,800,000 milliseconds. It is 12.5% of a day.
During 3 hours a resting heart beats about 12,600 times and a person walks roughly 14,400 metres at an easy pace.
Advertisement
What is a 3 hours timer good for?
- a long exam
- roasts and slow cooking
- tracking paid parking time
How to use it
Press the space bar or the Start button. When it reaches zero your chosen sound plays; on the main timer page you can add and chain several timers for intervals. Sound and volume settings are saved in your browser.
Advertisement
Frequently asked questions
3 hours equals 10,800 seconds.
Press Start: the time is already set. You can pause it, reset it, change the sound or go full screen.
Yes. The timer keeps running in the background and rings when it ends as long as the page stays open; the tab title shows the time left.
In supported browsers the "Keep the screen on" option uses the Wake Lock API to prevent it.