Click a number to type it, use arrow keys, or scroll to adjust
Alarm settings
Click a number to type it, use arrow keys, or scroll to adjust
Alarm settings
Click a number to type it, use arrow keys, or scroll to adjust
Alarm settings
Click a number to type it, use arrow keys, or scroll to adjust
Alarm settings
Time's Up!
A countdown built for the front of a classroom
This page opens with the large display mode on, and switching to full fullscreen mode scales the digits up further still — readable from the back row on a projector or a large monitor, with the site's navigation and settings out of view.
Everyday classroom uses
- Timing an independent work period or worksheet activity.
- Keeping a test or quiz section on schedule.
- Transition warnings between activities — a visible countdown reduces "how much time is left?" questions.
- Group work rotations, with the alarm marking each rotation's end.
Setting it up before class
Save your commonly-used durations — a 10 minute worksheet block, a 45 minute period — as custom presets ahead of time, so starting the right countdown between classes takes one click.
Related timers
Fullscreen Timer
A fullscreen online timer with huge, readable digits — built for classrooms, meetings, and stage presentations viewed from a distance.
45 Minute Timer
A 45 minute online timer built for class periods, long focus blocks, and extended workouts — accurate even if the tab is backgrounded.
Meeting Timer
An online meeting timer to keep standups, agendas, and time-boxed discussions on track, with a fullscreen mode for shared screens.
Frequently asked questions
Will this work on a classroom projector or interactive whiteboard?
Yes — it's a standard web page, so anything that can display a browser (a connected laptop, a Chromebook, most interactive whiteboards) can show it, including in fullscreen mode.
Can students see this without installing anything?
Yes — it's just a URL. No account, download, or installation is required on any device.