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90 Second Timer

01:30

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Space start / pause · R reset · F full screen · works with presentation clickers

A 90 second timer is a countdown that runs for 90 seconds and sounds an alarm when it reaches zero. This one starts on its own when the page opens and works full screen on a classroom projector, a laptop, or a phone.

Length
90 seconds
Equals
90 seconds is 1 minute and 30 seconds, or 1.5 minutes.
90 seconds from now
shown under the timer as "Ends at"
Alarm
Bell, chime, beep, gentle tone, or silent
Price
Free, no sign-up, nothing to install

What to use a 90 second timer for

  • Partner share-outs where each person gets a fair turn
  • Elevator-pitch practice
  • Rest between strength-training sets

Using a 90 second timer in the classroom

Short timers like 90 seconds work best for transitions. Tell students exactly what "done" looks like before you start it, then hold the line when the bell rings so the timer keeps its authority.

Teaching with it? The classroom timer adds one-tap presets for common routines, and thevisual timer shows time as a shrinking disc for students who are still learning to read a clock.

How this timer works

  • Starts by itself. The 90-second countdown begins when the page opens, so a bookmark is all you need.
  • Full screen. Press F to fill the display. Nothing else is shown — no menus and no ads.
  • Your choice of alarm. Pick a bell, chime, beep, or gentle tone, or run it silently.
  • Four displays. Digital with a ring, a visual disc, a progress bar, or a traffic light that turns yellow and red.
  • Shareable. "Copy link" saves your alarm and display choices in the link for students or colleagues.

Other timers

90 Second Timer FAQ

How do I set a 90-second timer?

Open this page and the timer is already set: it starts counting down from 90 seconds as soon as it loads. Press the space bar or Pause to stop it, Reset to go back to 90 seconds, and F for full screen.

How long is 90 seconds?

90 seconds is 1 minute and 30 seconds, or 1.5 minutes.

How much time is left on my timer?

The time remaining is shown in the large digits and in the browser tab title, so you can check it even from another tab. The ring around the digits also shrinks as time runs out.

Can I show this 90 second timer on a projector or smart board?

Yes. Press F or the Full screen button and the countdown fills the whole display with no ads or menus. A presentation clicker works too: the "next" button starts and pauses the timer.

Will the alarm still ring if I switch to another tab?

Yes. The timer follows your device clock, so it stays accurate in a background tab. Click anywhere on the page once so your browser allows the alarm sound.

Last reviewed by the TeachTimer team · How we build and check our tools