Online timer set for 180 minutes. Simply press start to activate the 3 hours timer. Alarm is optional.
How to use 3 hours timer
The timer will tell you when your 3 hours has run out. It will keep counting minutes and seconds upward instead.
Sound notification (alarm) is optional. You can keep the timer running in the background if you for example open a new tab. If you have sound notification the timer will tell you when time is up.