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72 Hour Timer

Sound / Message

Sound plays when the timer ends.

This is a ready-to-use 72 hours countdown timer. Press Start and an alarm sounds after 72 hours. You can change the time, the sound and the message at any time.

72 hours in other units

Need to know exactly how long the 72 hours timer runs? Here is the same duration expressed in other units of time:

  • 72 hours = 259,200 seconds
  • 72 hours = 4,320 minutes
  • 72 hours = 3 days

What can you use a 72 hours timer for?

A 72 hours countdown is a handy time box. Here are a few common ways people use it:

  • A countdown to a trip, a deadline or an event.
  • Planning study or work over several days. Keep the tab open and your device awake for very long timers.
  • Intermittent fasting windows, such as a 16-hour fast.

How to use the 72 hours timer

  • Press Start. The countdown for 72 hours begins right away.
  • Press Pause if you need to stop, then Resume to carry on from where you left off.
  • When time is up an alarm sounds and your message appears. Press Stop to silence it.
  • Want a different length? Change the hours, minutes or seconds before you press Start.

Nearby timers

Same duration, different unit

Frequently asked questions

How many seconds are 72 hours?

72 hours equal 259,200 seconds, which is 4,320 minutes or 72 hours.

Will the 72 hours timer keep running if I switch tabs?

Yes. The countdown is based on your device clock, so it stays accurate when the tab is in the background. Keep the tab open and your device awake so the alarm can sound.

Can I pause the 72 hours timer and resume it later?

Yes. Press Pause to stop the countdown and Resume to continue with the remaining time. Reset takes you back to the start.

Can I change the alarm sound?

Yes. Open the Sound / Message settings under the timer to pick a sound, preview it and add a custom message. Your choice is remembered in your browser.

Timers

minutes

hours

seconds

days