3 hour timer
Three hours covers a long exam, a slow cooker on its high setting, or an afternoon study session.
Ready
Ends 3 hours after you press Start.
Keyboard: Space start or pause, R reset, F full screen.
3 hours in other units
- Minutes
- 180
- Seconds
- 10,800
- Share of a day
- 12.5%
- 1/8 of a day
- On the timer
- 3:00:00
What a 3 hour timer is good for
- Slow cookers. Many slow-cooker recipes list about 3 to 4 hours on the high setting.
- Long exams. Some final exams and professional tests run about three hours.
- Study sessions. Three one-hour blocks, each followed by a short break.
Other timers
About this timer
The countdown runs against your device's clock from the moment you press Start, so it stays accurate in a background tab. The line under the digits shows the local time it will end. Pick one of ten alarm sounds, all generated in your browser (hear them on the countdown sounds page), and use full screen to read the time from across a room. Need a different length? Set a custom timer.
Related
Frequently asked questions
How do I set a timer for 3 hours?
This page is already set to 3 hours. Press Start, or the Space bar, and the countdown begins; when it reaches zero, the alarm sounds and the page shows Time's up. Pause stops the clock and Reset takes it back to 3 hours.
How many minutes are in 3 hours?
180 minutes, or 10,800 seconds.
Will the alarm go off if I switch tabs?
In most desktop browsers, yes. The countdown is worked out from the real clock, and the alarm is scheduled with the browser's sound engine when you press Start, so it stays on time in a background tab. Phones can pause web pages when the screen locks, so keep the screen on — the timer asks the browser to do that where it can — and turn the volume up.