20 Minute Timer
Twenty minutes for projects, labs and reading workshop.
- 100% free
- No signup
- Private: stays in your browser
- Updated November 2026
About this 20 minute timer
This 20 minute timer suits the heart of a lesson: reading workshop, a science lab or a block of project work. Twenty minutes is long enough to get deep into a task, and a visible countdown helps students plan their time.
Try telling students what should be done at the halfway point. When the ring is half empty, they can check themselves without you stopping the class.
Need something different? The full tool lets you set anything you like: classroom timer.
What fits in twenty minutes
Reading workshop
Twenty minutes of independent reading while you confer with students.
Science lab
Set up, run and record a short experiment before clean-up.
Project block
Groups work on a project with a check-in at the halfway mark.
Pomodoro for older students
Twenty minutes of focus, then a short break.
Frequently asked questions
Can I use the 20 minute timer as a Pomodoro timer?
Yes. Run 20 minutes of work, then switch to the 5 minute timer for a break.
Does it keep time in the background?
Yes. It uses the real clock, so it stays accurate even if the tab is hidden.
Can I make it quiet?
Yes. Mute the end sound; the red ring still shows the end.