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15 minute online classroom timer
This free online 15 minute classroom timer opens with the duration already selected for teachers who need a large countdown on a classroom screen or projector. A 15 minute classroom timer fits lesson transitions, guided practice, and mid-class checkpoints.
Ways to use a 15 minute classroom timer
- Protect a 15-minute guided practice block from overrunning.
- Time collaborative stations or lab steps.
- Use a 15 minute classroom timer before switching subjects.
What this classroom timer includes
- Large digital digits stay readable across a classroom.
- Timestamp-based timing stays accurate after switching browser tabs.
- Full-screen and screen-wake controls support projectors and classroom screens.
- The final 10 seconds use a visible warning; optional short end tones are available, not continuous music.
How to use this 15 minute classroom timer
- Confirm the selected duration is 15 minutes, or use Edit time to change it.
- Select Start when the activity begins.
- Pause and resume without losing the remaining time.
- When time reaches zero, use Start to repeat or Cancel to return to setup.
Related classroom tools
- TimerStart a classroom countdown with presets, projector mode, and wake lock.
- World ClockWorld clock with a live map, multi-city times, and day-night context.
- Flip ClockOnline flip clock with optional seconds and card styles for desks and classrooms.
- Digital ClockOnline digital clock with optional seconds, date, and display styles.
- StopwatchOnline stopwatch with laps, adjustable precision, and wake lock.
15 Minute Classroom Timer FAQ
- Is this already a 15 minute classroom timer?
- Yes. This URL loads a 15 minute classroom timer directly, and you can still edit the duration before starting.
- Is the 15 minute classroom timer free online?
- Yes. It runs free in the browser with no account and no app download.
- Does it keep counting in a background tab?
- Yes. Remaining time is calculated from an absolute end timestamp, so browser throttling does not slow the countdown.
- Do I need to sign in?
- No. The timer runs locally in the browser and is available without an account.