20-Minute Timer
A big twenty-minute countdown for conference talks, exam sections and focused work blocks.
The short answer: press Start for a 20-minute countdown with an alarm at zero. To put a 20-minute timer on top of your PowerPoint while you present, download SlideTimerApp and tap the 20-minute preset — it floats over your live Slide Show instead of living in a browser tab.
What a 20-minute timer is good for
- Conference talks and longer presentations
- Exam or test sections in class
- Deep-work and focus blocks
- Extended group projects and labs
How to use a 20-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 20-minute preset. Or type any minutes and seconds.
- Pin it on top and present. Press F5 — the 20-minute countdown floats over your slides and rings at zero.
Put this timer on top of your slides
SlideTimerApp floats a transparent 20-minute countdown over PowerPoint, Google Slides or Canva — free for Windows.
Download SlideTimerApp free ~3 MB · Windows · works offlineMore timers
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10-minute timer
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15-minute timer
Free online 15-minute countdown.
Frequently asked questions
Is this 20-minute timer free?
Yes. It is a free online 20-minute timer with start, pause, reset and an alarm at zero, running in your browser with no sign-up.
How do I time a 20-minute conference talk?
Download SlideTimerApp, pick the 20-minute preset, and pin it on top of your slides. The digits turn red as time runs low so you know when to wrap up, without checking your phone.
Can students see this timer during an exam?
Yes. Press Fullscreen to fill the projector, or use the SlideTimerApp app to overlay the 20-minute countdown on whatever is on screen.