15 Minute Countdown
A free 15 minute countdown timer that opens preset to 15 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 15 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 15 minutes?
15 minutes converts to 900 seconds, or exactly 1/4 of an hour. That is roughly 1.0% of a 24-hour day. Half of 15 minutes is 7 minutes 30 seconds, and two rounds back to back add up to 30 minutes.
Fifteen minutes is the classic 'academic quarter' grace period and a popular short-nap length.
Things that take about 15 minutes
- Take a 15-minute power nap; set the alarm before you lie down so you don't drift past it.
- Follow a 15-minute guided meditation, stretching or physio routine.
- Cap each agenda item or speaker at 15 minutes to keep a meeting on schedule.
- Run a 15-minute focus sprint on one small task — inbox triage, a single page, one bug.
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 15 minutes?
15 minutes equals exactly 900 seconds (15 × 60).
What fraction of an hour is 15 minutes?
15 minutes is exactly 1/4 of an hour. You would need 4 rounds of it to fill a full hour.
Can I pause the 15-minute timer halfway through?
Yes. Press Pause at any point and Start to continue; the remaining part of the 15 minutes is kept to the second.