What Is a 90-Minute Timer Used For?
A 90 minute timer is built for deep work. Many writers, developers and researchers like 90 minute blocks because hard, creative tasks take time to warm up. After a 90 minute block, take a proper 15–20 minute break: walk, eat, get away from the screen.
Coding or writing
Long enough to get past the warm-up and into real flow.
Serious study
A deep revision session for a hard subject.
Movie or long task
Time a film, a long meeting or a creative project.
Morning deep work
Protect your first 90 minutes for your most important task.
How to Use This Timer
- Press the Start button (the countdown also shows in your browser tab).
- Pick an alarm sound on the side panel. Click a sound to preview it.
- Keep the tab open. The alarm plays when the timer reaches 00:00, even in a background tab.
- Press Reset to run it again, or open the full list of timers for another length.
💡 The 90/20 deep work rhythm
Work for 90 minutes on one task, then take a 20 minute break. Two of these blocks in a morning can be more productive than a whole distracted day. If 90 minutes is too much, the 52/17 timer or the flow timer are good alternatives.
Frequently Asked Questions
How many seconds are in 90 minutes?
90 minutes is 5,400 seconds, or 1.5 hours.
Why do people use 90 minute work blocks?
Hard creative work often needs a long warm-up. A 90 minute block gives you time to reach deep focus and still stop before you're exhausted.
How long should my break be after 90 minutes?
About 15 to 20 minutes, away from the screen.
Does the timer work offline?
Yes. Once loaded, it keeps working without internet.
Is this 90 minute timer free?
Yes, completely free. No signup and no ads in the timer.
Related Timers
Need a different length? See all free online timers.