21 Minute Timer
Twenty-one minutes is about the runtime of a half-hour sitcom episode once the commercials are removed.
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Rings even in a background tab · Space bar = start/pause
What can you do in 21 minutes?
- One ad-free sitcom episode
- Sheet-pan sausage and peppers
- Short yoga session
- Scrubbing the bathroom
Tip: Use one episode as a reward and let the timer end the session so one does not turn into three.
21 minutes in other units
21 minutes
1,260 seconds
1,260,000 milliseconds
35% of an hour
fits 68 times into a day
Need a different length? Use the custom countdown timer, or set a clock-time alarm instead.
All timers
Seconds
Minutes
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Hours
21-minute timer FAQ
How do I set a timer for 21 minutes?
Press Start on this page. The 21-minute countdown begins immediately — no settings to change. Press the space bar to pause or resume.
Will the 21-minute timer ring if I switch tabs?
Yes. The countdown runs from a fixed end time, so it keeps going and rings in a background tab. The remaining time also shows in the tab title. Keep the tab open and the device unmuted.
Can I get a notification when it ends?
Yes — allow notifications when your browser asks after you press Start. You'll get a desktop or phone notification in addition to the beep.
Does it work offline?
Yes. After your first visit the page is cached, so the timer works without an internet connection.