Chrono Timer / Side page

3 Hour Timer

A 3 hour countdown with alarm for the long haul — slow cooking, parking meters, marathon study sessions. Start it and get on with your day.

Quick answer

Start a free 3 hour timer online with alarm on Chrono Timer. A 3 hour countdown with alarm for the long haul — slow cooking, parking meters, marathon study sessions. Start it and get on with your day.

Great for

  • Slow cooking
  • Parking meter reminders
  • Marathon study sessions
  • Batch cooking days

How to use the timer

  1. 1

    Set the time

    Use hours, minutes and seconds — or tap a quick preset below the display.

  2. 2

    Press start

    Hit play or press Space. The countdown keeps running if you switch tabs.

  3. 3

    Get alerted

    When time is up the alarm rings, with an optional notification and confetti.

Related timers

More goals

Guides · Browse all timer pages · Back to home timer

FAQ

How do I start a 3 hour timer?+

Open the page, confirm the duration, press start (or Space). The alarm sounds when time reaches zero—even if you switch tabs.

Can I change the 3 hour timer length?+

Yes. Adjust hours, minutes, and seconds anytime, or jump to another preset from related timers.

Is the 3 hour timer free?+

Yes—free on iautre.com, no sign-up, no ads.

Chrono Timer

Starting up…