20 Minute Countdown
A free 20 minute countdown timer that opens preset to 20 minutes. Press Start and the big display counts down to zero, then an alarm sounds. Use it for events, livestreams, games and breaks. No download, no signup.
What is this timer good for?
- A focused study or work sprint before a break
- A power nap (short enough to avoid grogginess)
- A home-workout circuit with timed sets
- Oven or air-fryer cooking steps
- A guided meditation or yoga sequence
How to use it
- The timer opens preset to 20 minutes.
- Adjust the hours, minutes or seconds for a different length.
- Press Start and the big display counts down.
- An alarm sounds at 00:00:00 — press Reset to run it again.
How long is 20 minutes?
20 minutes works out to 1,200 seconds, or exactly 1/3 of an hour. That is roughly 1.4% of a 24-hour day. Half of 20 minutes is 10 minutes, and two rounds back to back add up to 40 minutes.
Twenty minutes is the sweet spot for a power nap — long enough to rest, short enough to avoid grogginess.
Things that take about 20 minutes
- Do housework in 20-minute bursts — fold laundry, vacuum one floor or clear one shelf.
- Bake or roast — many sheet-pan dinners and traybakes need roughly 20 minutes in the oven.
- Cap a nap at 20 minutes so you wake before deep sleep leaves you groggy.
- Set a 20-minute screen-time limit for kids and let the neutral alarm end the negotiation.
FAQ
Will it ring if I switch tabs?
Yes. The timer calibrates against your system clock, so it stays accurate even in a background tab. Just don't close the tab.
Do I need to download anything?
No. The timer runs entirely in your browser with no download, signup or plugin.
Can I change the duration?
Yes. Type any hours, minutes and seconds into the fields, or pick a related timer above.
Is it free?
Yes, it is completely free to use.
How many seconds are in 20 minutes?
20 minutes equals exactly 1,200 seconds (20 × 60).
What fraction of an hour is 20 minutes?
20 minutes is exactly 1/3 of an hour. You would need 3 rounds of it to fill a full hour.
Can I pause the 20-minute timer halfway through?
Yes. Press Pause at any point and Start to continue; the remaining part of the 20 minutes is kept to the second.