What a 90 Minute timer is good for
- A long nap that covers one full sleep cycle of roughly 90 minutes.
- A deep work session, a popular length for one block of hard thinking.
- Exams and workshops booked for an hour and a half.
Press Start and the countdown runs for exactly 1 hour 30 minutes. It shows in the tab title too, so you can work in another tab and still see the time left. When it reaches zero, a gentle alarm plays and the dial flashes until you stop it.
Other timer lengths
- 1 Minute Timer
- 2 Minute Timer
- 3 Minute Timer
- 5 Minute Timer
- 10 Minute Timer
- 15 Minute Timer
- 20 Minute Timer
- 25 Minute Timer
- 30 Minute Timer
- 45 Minute Timer
- 1 Hour Timer
- 90 Minute Timer
- 2 Hour Timer
Planning your rest as well? The sleep cycle calculator finds a bedtime that ends on a full cycle. For split times, open the stopwatch.
Frequently asked questions
How many seconds are in a 90 Minute timer?
5,400 seconds. The 90 Minute timer counts them down from 1:30:00 and plays an alarm at zero.
Will the 90 Minute timer ring if I switch tabs?
Yes. The timer works from the moment it should end, not from ticks, and the alarm is scheduled on the browser's audio clock, which keeps running in background tabs. Keep the sound on and the tab open.
Can I change the 90 Minute timer to a different length?
Yes. The hours, minutes and seconds fields and the presets work as usual. This page only starts at 1 hour 30 minutes; every other length is one tap away, or open one of the timers linked below.