15 Second Timer
A free 15 second timer, preset and ready. Press Start for a quick 15 seconds countdown with an alarm at zero. Perfect for short drills, plank holds, brushing teeth and quick games. Runs in your browser — no download.
What is this timer good for?
- A plank, wall-sit or other isometric hold
- Brushing teeth (the dentist's recommended length)
- A quick HIIT interval or sprint
- A board-game or quiz turn timer
- A short breathing or grounding exercise
How to use it
- The timer opens preset to 15 seconds.
- 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 seconds?
15 seconds is 25% of a minute — exactly 1/4 of it. At a relaxed speaking pace of two words per second, about 30 words fit into this window. Half of 15 seconds is about 7 seconds, and two rounds back to back add up to 30 seconds.
Fifteen seconds is a common hold time for basic stretches.
Things that take about 15 seconds
- Give kids exactly 15 seconds for a speed tidy-up race or for taking turns on a toy.
- Rest between weight-lifting sets — 15 seconds keeps the intensity high without letting muscles cool down.
- Use 15 seconds as the answer clock in quiz nights, charades and board games.
- Time a 15-second breathing exercise: inhale slowly, hold, then exhale against the clock.
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 long is 15 seconds really?
15 seconds is 15 seconds — 25% of a minute.
Can I pause the 15-second timer halfway through?
Yes. Press Pause at any point and Start to continue; the remaining part of the 15 seconds is kept to the second.