Set an alarm for 21 Minutes

⏱ A countdown timer for 21 Minutes (1,260 seconds). Press Start and an alarm sounds when time is up.
21 Minutes Timer
21Minutes
:
0Seconds
Friday, September 25, 2026

Set a timer for another length

21 Minutes in other units

Seconds1,260
Milliseconds1,260,000
Minutes21
Hours0.35
Share of an hour35%
Share of a day1.458%
Fits into one day68.57 times

When does a 21 Minutes timer end?

StartEnds
6:00 AM6:21 AM
8:00 AM8:21 AM
9:00 AM9:21 AM
12:00 PM12:21 PM
3:00 PM3:21 PM
6:00 PM6:21 PM
9:00 PM9:21 PM

Press Start above and the finish time for right now is shown under the timer.

What can you do in 21 minutes?

Work in a focused block — the Pomodoro Technique uses 25 minutes of work followed by a 5-minute break.

Take a 20-minute power nap.

Go for a brisk walk.

Questions about the 21 minutes timer

How do I set a timer for 21 minutes?

Press Start on this page. The timer counts down 21 minutes and plays an alarm sound when it reaches zero. You can pause or reset it at any time.

How many seconds is 21 minutes?

21 Minutes is 1,260 seconds.