About the 45 minute timer
Forty-five minutes is about the length of a typical class period, which makes this timer useful for exams, lessons, and long focus sessions. The progress ring shows how much of the period is left.
Ways to use it
- Timed exams and assessments.
- Lesson pacing for a full period.
- Long study or deep-work sessions.
Frequently asked questions
Can students see the time on a projector?
Yes. Fullscreen mode makes the numbers fill the screen.
Will it stay accurate for 45 minutes?
Yes. It’s based on the clock, so it stays accurate even if the tab is in the background.
Can I keep the timer on screen while I present slides?
Yes. Click "Pop out timer" and a small timer window floats on top of everything, including Google Slides or PowerPoint in fullscreen. Drag it to a corner and resize it. In Chrome and Edge it has its own Start, Pause and Reset buttons.
How do I make the timer silent?
Click the big "Sound on" button so it says "Sound off". The timer will only flash the screen when time is up. Your choice is remembered next time.
Will the timer keep running if I switch tabs?
Yes. The timer counts from the clock, not from the page, so it stays accurate in a background tab. The tab title also shows the time left.
Is the screen flash safe for students?
Yes. It pulses slowly, about once a second, well below the speed that can affect people with photosensitive epilepsy, and stops after 10 seconds. You can turn it off too.