21 seconds timer
Set a timer for 21 seconds. Rings when it's done.
00:21
A countdown timer for 21 seconds. Press the "Start" button to start the timer. The timer will alert you when it expires. You can reset the timer at any time using the "Reset" button. You can also pause the timer at any time using the "Pause" button.
Custom timer
Hours
Minutes
Seconds
Things you can do in 21 seconds
- Read 0.175 pages of a book
- Walk 0.0175 miles
- Read 1 email
- Watch 1 TikTok
- Blink 42 times
- Click this 131 times
In 21 seconds...
- Your heart beats 21 times
- Light travels 3,906,002 miles
- Earth travels 399 miles around the Sun
- The International Space Station travels 99 miles
- Elon Musk earns $105,000
- 1,323,001 Google searches get made
- The U.S. national debt increases by $955
Popular timers
1 minute timer
2 minute timer
3 minute timer
4 minute timer
5 minute timer
6 minute timer
7 minute timer
8 minute timer
9 minute timer
10 minute timer
15 minute timer
20 minute timer
25 minute timer
30 minute timer
35 minute timer
40 minute timer
45 minute timer
45 minute timer
50 minute timer
55 minute timer
60 minute timer
Other timers
4 minutes and 35 seconds12 minutes and 38 seconds16 minutes and 25 seconds17 minutes and 41 seconds20 minutes and 31 seconds20 minutes and 56 seconds21 minutes and 44 seconds22 minutes and 31 seconds22 minutes and 35 seconds27 minutes and 30 seconds31 minutes and 9 seconds32 minutes and 53 seconds33 minutes and 47 seconds38 minutes and 4 seconds42 minutes and 9 seconds42 minutes and 51 seconds44 minutes and 60 seconds45 minutes and 6 seconds47 minutes and 26 seconds53 minutes and 31 seconds56 minutes and 1 seconds56 minutes and 18 seconds56 minutes and 60 seconds58 minutes and 14 seconds58 minutes and 49 seconds1 hours and 22 minutes14 hours and 34 minutes16 hours and 43 minutes17 hours and 60 minutes19 hours and 46 minutes
Frequently asked questions
Why do I need a timer?
If you're here, you probably already need it for something. In any case, timers are useful any time you need to perform a certain action for a specific amount of time. The timer alerts you when that time period is over.
How do I know when the timer is up?
When the timer is up, we'll play a 2 second alert and the timer will blink red. We'll also update the timer in the page title, so you will instantly see it even if you have multiple browser tabs open.
Can I use it on my phone?
Yes, it works on any device with a browser.
How can I support you?
Bookmark timer.guru and share it on social media.