3 hour timer
Three hours covers a long exam, a slow roast or an afternoon study session with breaks.
Ready
Ends 3 hours after you press Start.
Free, no sign-up — runs in your browser. Nothing you set is sent anywhere.
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
- Long exams. Some professional and university exams last three hours.
- Slow roasts. Large roasts and slow-cooked dishes often take about three hours; check the recipe.
- Deep work. Plan a long focus session, with short breaks every hour or so.
- Charging and curing. Time a battery charge, glue setting or paint drying between coats.
Other timers
Timer modes
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.
How many seconds is 3 hours?
10,800 seconds, or 180 minutes. The display starts at 3:00:00.
Will the alarm go off if I switch tabs or lock my phone?
In a background tab on a computer, 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. Phones often pause web pages while the screen is locked, so the sound may wait until you unlock; keep the screen on (the timer asks the browser to do that where it can) and the volume up. You can also turn on "Notify me when time's up" for a system notification. When you come back to the page, it shows the right state straight away.