Classroom timer

Huge digits, a bar that turns amber and then red, an alarm at zero. Press F and it fills the screen.

5:00

Space start / pauseR reset+ add a minuteF full screenM sound

Timers ready to start

Under a minute

5 seconds10 seconds15 seconds20 seconds25 seconds30 seconds40 seconds45 seconds50 seconds

By the minute

1 minute90 seconds2 minutes3 minutes4 minutes5 minutes6 minutes7 minutes8 minutes9 minutes10 minutes11 minutes12 minutes13 minutes14 minutes15 minutes16 minutes17 minutes18 minutes19 minutes20 minutes21 minutes22 minutes23 minutes24 minutes25 minutes26 minutes27 minutes28 minutes29 minutes30 minutes31 minutes32 minutes33 minutes34 minutes35 minutes36 minutes37 minutes38 minutes39 minutes40 minutes41 minutes42 minutes43 minutes44 minutes45 minutes46 minutes47 minutes48 minutes49 minutes50 minutes51 minutes52 minutes53 minutes54 minutes55 minutes56 minutes57 minutes58 minutes59 minutes

An hour and longer

1 hour75 minutes90 minutes105 minutes2 hours150 minutes3 hours4 hours

Good to know

Will the timer keep time if I switch tabs or the laptop sleeps?

Yes. It counts down to a moment on the clock rather than adding up ticks, so a background tab or a sleeping laptop cannot make it run slow. If it finishes while the tab is hidden, the alarm still sounds.

Can the class see it from the back of the room?

Press F, or the full-screen button. The digits fill the screen and the bar under them turns amber near the end and red for the last ten seconds.

What happens if I reload the page by accident?

The countdown carries on from where it should be. The running timer is kept in your browser until you reset it.

How do I set a time that is not in the list?

Type it in the box: 7 means seven minutes, 2:30 is two and a half, 90s is ninety seconds, 1h 15m works too.

Does the screen stay on?

While the timer runs, DeskWheel asks the browser to keep the screen awake. Most current browsers allow it; if yours does not, the countdown is still correct when the screen comes back.

The rest of the kit