🌐 EN

21 Minute Timer

Sound / Message

Sound plays when the timer ends.

This is a ready-to-use 21 minutes countdown timer. Press Start and an alarm sounds after 21 minutes. You can change the time, the sound and the message at any time.

21 minutes in other units

Need to know exactly how long the 21 minutes timer runs? Here is the same duration expressed in other units of time:

  • 21 minutes = 1,260 seconds
  • 21 minutes = 0.35 hours

What can you use a 21 minutes timer for?

A 21 minutes countdown is a handy time box. Here are a few common ways people use it:

  • One Pomodoro work block (25 minutes) or a short power nap (20 minutes).
  • A HIIT workout, a stretching routine or a quick run.
  • Baking, roasting or any oven timing when you step away from the kitchen.

How to use the 21 minutes timer

  • Press Start. The countdown for 21 minutes 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

Frequently asked questions

How many seconds are 21 minutes?

21 minutes equal 1,260 seconds, which is 21 minutes or 0.35 hours.

Will the 21 minutes 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 21 minutes 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