45-Minute Timer
A large forty-five-minute countdown for class periods, seminars and exam papers.
The short answer: press Start for a 45-minute countdown with an alarm at zero. To put a 45-minute timer on top of your PowerPoint while you present, download SlideTimerApp and tap the 45-minute preset — it floats over your live Slide Show instead of living in a browser tab.
What a 45-minute timer is good for
- A full class period or lesson
- Seminars and keynote talks with Q&A
- Timed exam papers and mock tests
- Workshop sessions and training modules
Running a 45-minute lesson or seminar
Forty-five minutes is a common lesson and seminar length, which makes it the hardest to keep on track: the main content runs long and the activity or questions at the end get squeezed. Keep the countdown visible over your slides, and both you and the room can see how much of the session is left. For exams, the exam timer has a projector-friendly layout.
How to use a 45-minute timer in PowerPoint
This page is great for a quick countdown on your screen. But a browser tab cannot stay on top of a full-screen Slide Show. For that, use the free overlay app:
- Download SlideTimerApp. Open the free portable Windows app.
- Tap the 45-minute preset. Or type any minutes and seconds.
- Pin it on top and present. Press F5 — the 45-minute countdown floats over your slides and rings at zero.
Free 45-minute timer download for PowerPoint
SlideTimerApp floats a transparent 45-minute countdown over PowerPoint, Google Slides or Canva — a free ~3 MB download for Windows, no install and no sign-up.
Download SlideTimerApp free ~3 MB · Windows · works offlineMore timers
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Frequently asked questions
Is this 45-minute timer free?
Yes. It is a free online 45-minute timer that runs in your browser with start, pause and reset and an alarm at zero. No sign-up needed.
Can students see a 45-minute timer during a lesson?
Yes. Press Fullscreen to fill the projector, or use the SlideTimerApp desktop app to float the 45-minute countdown over your slides so it stays visible while you teach.
Is there a free 45-minute timer download for PowerPoint?
Yes. SlideTimerApp is a free ~3 MB download for Windows that floats a 45-minute countdown on top of your live Slide Show. It is portable, so there is no installer and no add-in to enable inside PowerPoint — download it, tap the 45-minute preset and present. If you would rather not download anything, the timer at the top of this page runs in your browser instead.