Duration
180 minutes (10,800 seconds).
03
Hours
:
00
Minutes
:
00
Seconds
Timer set for 3 hours
When running, background recovery uses the saved deadline. Keep this browser tab open; background scheduling, sound, and Wake Lock depend on browser and device support.
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3 Hour Timer
Start a 180-minute countdown in the browser. Choose an alert sound, pause or resume the countdown, reset it when needed, and keep the page open until it completes.
Controls
Start, pause, resume, and reset the current countdown.
Completion
A selected sound can play when browser audio is permitted.
Ways to use 180 minutes
- • Project stages
- • Long events
Example tasks
- • Cooking projects
- • Work sessions
Browser and device limits
Keep the timer tab open. Fullscreen can request the Screen Wake Lock API on supported browsers and devices, but Wake Lock may be unavailable or released. Test the selected sound because browsers and device settings can restrict audio playback.
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Questions about the 3 hour timer
Can I change 3 hour timer?
This page opens a preset duration. Visit the main timer page to enter another duration from 1 second through 99 hours, 59 minutes, and 59 seconds, or choose a target date and time.
What sounds are available for 3 hour timer?
Choose from the 27 sounds in the checked-in library and preview one before starting. Browser audio permission and device settings can affect playback.
What happens if I switch tabs?
The timer uses elapsed timestamps while its page remains open. Background updates and audio are subject to browser and device behavior.
Can I use fullscreen with 3 hour timer?
Fullscreen is available where supported. It can request Wake Lock only when the browser and device support the Screen Wake Lock API; keep the tab open, and remember that audio may be limited.
Can I restart 3 hour timer?
After a countdown completes, use the timer controls to start the same preset again or reset it before starting.