40 Second Timer
Forty seconds is the work block in 40/20 interval training, a popular step up from Tabata’s 20/10. Press Start and it rings at zero, even if you switch tabs.
Space start/pause · R reset · F full screen
Alarm & notification settings
Sound needs one tap on the page first (a browser rule). Keep this tab open: closing it stops every timer’s alarm. Why timers stay accurate in background tabs.
What people time with 40 seconds
- 40 s work, 20 s rest circuits
- A short plank or wall-sit progression
- Timing a quick self-introduction
- Microwaving a small portion in short bursts
40 seconds in other units
| Seconds | 40 |
|---|---|
| Minutes | 0.67 |
| Hours | 0.0111 |
| Share link | countdownpro.app/?t=40s |
Questions
How do I set a 40 seconds timer?
Press Start on this page. The 40 seconds countdown begins at once and rings when it reaches zero. You can also press the space bar to start and pause.
How many seconds are in 40 seconds?
40 seconds is 40 seconds.
Will it still ring if I switch to another tab?
Yes, while the tab stays open. The alarm is scheduled for an exact end time when you press Start, so a background tab does not delay it. Turn on notifications to get a system alert too.
Can I run this alongside other timers?
This page runs one big timer. For several at once, open the main countdown timer board, which runs any number of labelled timers side by side.