25 minute timer
A 25 minute countdown timer for the projector: big digits, a quiet chime, warning colours and full screen. Good for station rotations, longer writing and focus blocks.
25:00
Keys: Space start or pause · R reset · ← → 30 seconds · 1–8 the presets · M sound · F full screen
How to use it
- The timer is already set to 25 minutes. Press Start, or tap the Space bar.
- Press F to fill the screen. The buttons fade away until you move the mouse; press Esc to come back.
- Add or take off 30 seconds with the arrow keys. If you need a different length, press a preset or choose Custom.
Ideas for class
- Run a focus block where students work on one task and nothing else.
- Follow the focus block with a five-minute break using the 5 minute preset.
- Give a 25-minute writing sprint and have students count their words at the end.
- Time a 25-minute reading session followed by a short written reflection.
- Use it for homework club, with a break at the end.
- Run a 25-minute independent project check-in with a clear end time.
- Split 25 minutes into 18 to work and 7 to share: press Start, and pause at 18:00 elapsed to switch.
Related
Questions
What is the Pomodoro technique and how do I use this timer for it?
The Pomodoro technique alternates focused work with short breaks. The usual pattern is 25 minutes of work and a 5 minute break. Use this 25 minute timer for the work, then press the 5 minute preset for the break, and repeat. Choose the Quiet style if you don't want chimes.
How do I keep a 25 minute timer on the screen for a whole block?
Press F to fill the screen and the controls fade away until you move the mouse. The timer keeps time by the clock, so it stays correct even if the screen dims or the tab is in the background. For a 25 minute block with stations, set it once and press R to start the next rotation from the top.
How do I change the 25 minute timer?
Press a preset button or choose Custom and type a length such as 7:30 or 90s. The page address updates to carry the new length, so you can bookmark it or share it. This page always opens at 25 minutes.
Will the 25 minute timer keep the right time if the tab is in the background?
Yes. The countdown compares the clock when you pressed Start with the clock now, so it stays right when a tab sleeps. When it reaches zero it plays a short, soft chime (press M to turn the sound off) and the page title in the tab says the time is up.
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