15 Minute Timer
This free 15 minute timer is ready to go — the countdown is already set to 15 minutes. Just press Start and watch it tick down. When it reaches zero a built-in alarm sound plays. No download, no signup; works on desktop and mobile.
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
- 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.
- Fit in a 15-minute bodyweight circuit — squats, push-ups and lunges until the bell rings.
- Simmer rice, boil eggs or steam vegetables — many stovetop staples finish in about 15 minutes.
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 restart the 15-minute countdown when it finishes?
Yes. When the alarm sounds, press Reset and then Start to run the full 15 minutes again — handy for repeated rounds.