40 Minute Timer

One click to startAlarm at zeroKeeps time in the background

40:00

Time's up

Space to start or pause, R to reset, F for full screen.

Forty minutes is the length of a school lesson in many countries and of plenty of exam sections. Press Start and it counts down from 40:00.

What people use a 40 minute timer for

A practice exam section under real time.
A lesson or a class activity.
Brown rice on the stove, which takes 40 to 45 minutes.
A longer workout or a run.

How this timer works

It remembers the moment it will end, so it stays right when you switch tabs or your phone locks.
At zero it plays a few short beeps, vibrates on phones that can, and shows "Time's up" in the tab title.
While it runs it asks the screen to stay on. Full screen makes the numbers big enough to read across a room.

Other timers

10 Second 20 Second 30 Second 1 Minute 90 Second 2 Minute 3 Minute 4 Minute 5 Minute 8 Minute 10 Minute 12 Minute 15 Minute 20 Minute 25 Minute 30 Minute 45 Minute 50 Minute 1 Hour 90 Minute 2 Hour Any length

Questions people ask

How long is a school lesson?

It depends on the country and the school, but most lessons are between 40 and 50 minutes.

Can I show it on a projector?

Yes. Press Full screen and the timer fills the display. The space bar starts and pauses it.

Does the timer work without an internet connection?

Once the page has loaded, yes. The timer runs in your browser and does not need the network to count down or to beep.

Counting down to a date rather than a few minutes? The countdown maker works for any day, and with Pro the Countdown app puts it on your iPhone Lock Screen.