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TimerHub

Classroom Timer

Free online classroom timer for lessons, transitions, quizzes, and group work.

Use this classroom timer on a projector, smart board, interactive whiteboard, tablet, or shared classroom screen. Switch to fullscreen for a large visual countdown the whole room can see, start with 5 minutes, edit the time directly, or jump to common lesson durations like a 10 minute classroom timer. For a picture instead of digits — sand draining, a candle burning down, a traffic light, a race — open the classroom timers hub.

teacher timerschool timerclassroom screen timerclassroom visual timeronline classroom timer
05:00
Alarm on

Space start/pause · R reset · +− adjust

Floating Picture-in-Picture needs a Chromium browser; this one doesn't support it.

Background sound

Off

Quick Timers

1m90s3m5m10m15m30m45m1h4h

More ways to run this timer

Run it with rain, waves or a focus pad →Same countdown, with an ambient bed that fades out at zero. No video, no ads.Need a visual countdown instead? →Sand, candle, rocket, traffic light and seven more — built for projectors and classrooms.

Proven Timer Pages

4 Hour Timer45 Minute Timer9 Minute Timer90 Second Timer11 Minute Timer12 Minute Timer
Name, share, or schedule a custom countdown →

Related Timers

Visual TimerSand TimerTraffic Light TimerSensory TimerFullscreen Timer5 Minute Timer10 Minute Timer15 Minute Timer20 Minute Timer

Embed this timer

Paste this into any page — a class blog, a lesson plan, a meeting agenda — and visitors get a working classroom timer with no script tag, no account and no tracking. Please keep the credit link.

About the Classroom Timer

Free classroom timer for teachers, lessons, transitions, quizzes, reading time, and group activities. A large visual countdown for projectors, smart boards, and classroom screens with a sound alarm and quick duration links.

TimerHub calculates remaining time from an absolute finish timestamp, so missed browser callbacks do not create drift. Read the timing accuracy methodology and reproducible tests.

Common Uses

  • Warm-up activities
  • Station rotations
  • Timed quizzes
  • Silent reading
  • Group work transitions
  • Projector and smart board countdowns

How to Use the Classroom Timer

  • Click Start (or press Space) to begin your 5 minute countdown
  • Press Space again to pause and resume, or R to reset the timer
  • Use the +/- buttons to adjust by 1 minute while running
  • Toggle Repeat to loop the countdown automatically, and watch the finish time under the display
  • Use the Fullscreen control below the timer for a large full-screen countdown (Esc to exit)
  • Pick a background sound — rain, ocean, fireplace or brown noise — that fades out at zero
  • Choose or mute the alarm sound from the sound settings in the header
  • Add ?autostart=1 to the link to start the countdown on load
  • Enable notifications for alerts when your classroom timer finishes, even in a background tab

Frequently Asked Questions

Can I use this classroom timer on a projector?▾

Yes. Open TimerHub on the classroom computer or tablet, set the time, and use fullscreen mode for a large countdown students can see across the room.

What classroom timer length should I start with?▾

Five minutes works well for warm-ups and transitions. Use 10 to 20 minutes for group work, quizzes, silent reading, or station rotations.

Does the classroom timer have sound?▾

Yes. The timer plays an alarm when time is up, and you can mute sounds from the header if you only want a visual countdown.