15 Second Timer
Fifteen seconds is the standard short work interval: long enough to raise your heart rate or complete a rinse, short enough to repeat without a long recovery.
00:1515 Second Timer
Keep this tab open — the countdown stays accurate in the background, and the alarm sounds when it reaches zero.
What a 15 second timer is good for
Short countdowns are the ones people reach for most often mid-task — a rest between sets, a hold position, a rinse, a speed round — where glancing at a clock breaks concentration. This timer runs in the page, counts down out loud with an alarm at zero, and needs no app or sign-up.
- Short sprint or high-intensity work intervals
- Swishing mouthwash for the recommended time
- Rest between light warm-up sets
- A quick timed hold in mobility work
How long is 15 seconds?
| Unit | 15 seconds equals |
|---|---|
| In seconds | 15 seconds |
| In minutes | 0.25 minutes |
| In hours | 0.004 hours |
| On the clock | 0:15 |