1 Hour 30 Minute Timer

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  • Set Time
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How the 1 hour 30 minute timer works

This 1 hour 30 minute timer counts down from 1:30:00 and sounds an alarm at zero. It's the same as a 90 minute timer, just written the way many people search for it.

  1. Press Start. The page shows when it will end, for example "ends at 3:45 PM."
  2. Go full screen with the button or the F key.
  3. Leave the tab open. Time is measured against your device clock, so it stays accurate even in a background tab.

Where 90 minutes comes up

UseWhy 1 hour 30 minutes fits
Block-schedule classesMany high schools on a block schedule run class periods of around 90 minutes.
Deep study sessionLong enough for a full practice test section or a big chunk of reading.
SoccerA regulation match is two 45-minute halves, 90 minutes of play.
Long napA sleep cycle is often described as roughly 90 minutes, so this length is popular for a full-cycle nap.

Tips

For timed exam practice, the exam timer has a 90 minute preset and shows warnings at 30, 10 and 5 minutes left. For naps, the nap timer lets you add a few minutes to fall asleep and plays a gentle bell.

Ninety minutes is a long stretch to focus. If your attention drops, try splitting it into three 25 minute Pomodoros with short breaks on the Pomodoro timer.

FAQ

Is 1 hour 30 minutes the same as 1.5 hours?

Yes: 1.5 hours, 90 minutes and 5,400 seconds are all the same length.

Does the alarm ring if I close the tab?

No. Sounds play only while the page is open in a browser tab, so keep it open (it can be in the background).