What can you do in 20 seconds?
- Hand washing (recommended time)
- Tabata work interval
- Eye break (20-20-20 rule)
20 Seconds in other units
| Seconds | 20 |
|---|---|
| Minutes | 0.333 |
| Hours | 0.0056 |
| Milliseconds | 20,000 |
When will it end?
The timer shows its end time as soon as you press start. Some examples of when 20 seconds runs out:
| Start | Ends at |
|---|---|
| 09:00 | 09:00:20 |
| 12:30 | 12:30:20 |
| 18:00 | 18:00:20 |
| 22:45 | 22:45:20 |
What happens in that time?
| Walking (3 mph) | 0.02 mi |
|---|---|
| Running (6 mph) | 0.03 mi |
| Heartbeats (70 per minute) | about 23 |
| Distance light travels | 3.73 million mi |
| Share of a day | 0.02% |
Based on typical averages; individual values vary.
For any other length, use the main online timer, or convert time units with the time converter.
Frequently Asked Questions
How many seconds are in 20 seconds?
20 seconds = 20 seconds = 0.333 minutes = 0.0056 hours.
Does the 20 second timer keep running in the background?
Yes. It follows the real clock, so it ends on time even if you switch tabs. Just keep the tab open; on phones use "Keep screen awake".
Can I use my own music as the alarm sound?
Yes. Choose "Your own sound" in the sound menu and pick an audio file from your device. It's stored only in this browser and never uploaded.