4 Hour Timer

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Running a 4 hour timer

This 4 hour timer counts down from 4:00:00 and plays an alarm at zero. As soon as you press Start, it shows the clock time it will end, for example "ends at 5:30 PM."

What a four-hour countdown is good for

  • Half a workday. Four hours is half of a standard eight-hour day. Use it to mark a morning shift or the point to take lunch.
  • Long study days. A big review session before finals, or a timed take-home exam with a four-hour window.
  • Cooking. When a slow-cooker or oven recipe calls for four hours, set it and stop checking the clock. Always follow your recipe's time.
  • Limits. A gaming session, an online auction you're watching, or a parking window.

Make long sessions easier

Few people focus for four straight hours. Try running four rounds of the 50/10 timer (each round is 50 minutes of focus and 10 minutes of break, exactly one hour) while this page tracks the overall time.

Before you start

  1. Plug in your laptop or phone. A sleeping device can't play the alarm.
  2. Choose a loud sound if you'll be in another room.
  3. Press Start and leave the tab open. You can use other tabs; the remaining time shows in the tab title.

FAQ

Is this timer accurate over four hours?

Yes. It measures time against your system clock instead of counting ticks, so it doesn't drift when the tab is in the background.

Can I set 4 hours 30 minutes?

Use Set Time on this page, or the countdown timer for any custom length.