Classroom Timer
A large, classroom-visible countdown with quick presets, a progress ring, alarm sound, and full-screen mode.
Why use a classroom timer?
Time-boxing classroom activities — giving students a fixed window to brainstorm, discuss, or write — improves focus and pacing. A visible countdown lets everyone see how much time remains, reducing 'how much longer?' questions and keeping transitions smooth.
This free timer is designed for the classroom: the display is large enough to read from the back of the room, the progress ring gives an at-a-glance sense of elapsed time, and the alarm sounds automatically when time is up. Go full-screen on a projector for maximum visibility.
Quick example
Set the timer to 5 minutes for a warm-up writing task. The progress ring shrinks as time passes, turning orange in the last 10 seconds. When it hits zero, a triple-beep alarm plays. Reset and set 15 minutes for the main activity.
Tip: use the Pomodoro timer variant for 25-minute focus sessions with structured breaks.
Frequently asked questions
Yes. Click the full-screen button to expand the timer to fill the entire screen. The large digits and progress ring are easily readable from the back of a classroom.
Quick presets include 1, 3, 5, 10, 15, 20, 25, and 30 minutes. You can also set any custom time up to 180 minutes.
Yes, a triple-beep alarm plays automatically when the countdown reaches zero. The sound is generated in the browser — no external files needed.
Yes. The interface is fully responsive and works on phones, tablets, laptops, and desktops. Full-screen mode works on all devices that support the Fullscreen API.