The simplest 90-minute countdown timer
Working in 90-minute blocks? Run 90/20 on the Pomodoro timer: 90 minutes of focus, then a 20-minute break, timed for you.
Frequently asked questions
How do I use this 90 minute timer?
Press the play button to start the 90-minute countdown. The time left also shows in the browser tab title, and an alarm sounds when the time is up. Use pause to stop the clock and reset to start again.
Why work in 90-minute blocks?
Many people plan deep work in blocks of about 90 minutes, after the roughly 90-minute rest-activity cycle described by sleep researcher Nathaniel Kleitman. The evidence for a fixed daytime cycle is mixed, so treat 90 minutes as a sensible upper limit for one focused block and take a real break afterwards.
Is this timer free?
Yes. It runs in your browser on phone or desktop, with no sign-up or download.
Can a timer run the breaks between blocks for me?
Yes. Choose the 90/20 preset on the free online Pomodoro timer: 90 minutes of focus, then a 20-minute break. The FocusCommit app adds tasks, a Kanban board and statistics.