3 Hour TimerFree Online Countdown
Set a timer for 3 hours with a loud alarm. Pause, add a minute, share the link.
Set time
Quick timers
Keep this tab open with volume on. Tap Test sound once to allow audio.
Online 3 hour timer
This page gives you a free online 3 hour timer. The time is already set to 3 hours, so just tap Start Timer, keep the tab open and a loud alarm rings when 3 hours are up.
A 3 hours countdown is popular for long focus block, exam preparation and slow cooking. You can pause, add one more minute or restart at any time.
Popular uses for a 3 hours timer
Long focus block
Plan a long stretch of work with a clear end.
Exam preparation
Study in long sessions with a visible countdown.
Slow cooking
Keep track of roasts, stews and slow-cooked meals.
Rest or sleep
Set a long rest and wake up on schedule.
3 hours in other units
How to use the 3 hour timer
- 1Check that the timer shows 3 hours, or change hours, minutes and seconds.
- 2Tap Start Timer and allow notifications when your browser asks.
- 3Watch the ring count down. Pause, resume or tap +1 min whenever you need.
- 4When 3 hours are over, a loud alarm rings. Tap Stop alarm or restart the same timer.
Other timers like 3 hours
3 hour timer FAQ
How do I set a timer for 3 hours?
The 3 hour timer is already selected on this page. Tap Start Timer, allow notifications if asked, and keep the tab open with your volume up. You will hear a loud alarm when 3 hours have passed.
How many seconds, minutes and hours is 3 hours?
3 hours equals 10800 seconds, 180 minutes or 3 hours.
Will the 3 hour timer keep running if I close the tab?
No, the tab must stay open for the alarm to play. You can switch to other tabs or apps, and the timer keeps its end time even if you refresh the page.
Can I pause or add time to the 3 hour timer?
Yes. Use the Pause button to stop the countdown and Resume to continue. Tap +1 min to extend a running timer, or Reset to start over.
Does the 3 hours timer work on iPhone and Android?
Yes. It works in Safari, Chrome, Edge and Firefox on iPhone, Android, Windows and macOS. It is free and needs no app or signup.