How to use the 20 minute timer
- Press Start (or the space bar). The timer is already set to 20 minutes.
- Press Full screen to show it on a projector, smartboard or TV.
- When time is up it beeps three times and the screen flashes. Press Reset to run it again.
What 20 minutes is good for
Twenty minutes is a common study block and the interval in the 20-20-20 rule for screen work: every 20 minutes, look at something 20 feet away for 20 seconds.
- Study or revision blocks
- Exam practice sections
- Screen breaks using the 20-20-20 rule
- Baking and roasting checks
Other timer lengths
1 min2 min3 min5 min10 min15 min25 min30 min45 min1 hour
Need laps or to count up instead? Use the stopwatch.
Questions and answers
What is the 20-20-20 rule?
A habit recommended for eye strain: every 20 minutes of screen work, look at something about 20 feet (6 metres) away for 20 seconds. Run this timer on repeat as the reminder.
Does it work on a phone?
Yes, on any browser. Keep the screen on if you want to hear the beep.
Is this 20 minute timer free?
Yes, free with no sign-up and no app to install. It runs in your browser on a phone, tablet or computer.
Free to use, runs in your browser, nothing uploaded. Last updated 2026-10-07. Made by HandyToolkits; questions to [email protected].