90 Minute Timer
This 90 minute timer is set to 1:30:00: press Start and it counts down an hour and a half, then plays your alarm.
Set. Start. Take a breath.
Extra time applies to this session only.
Pause and reset to change the start time.
Sound & display Make it work for you
Press Test sound to check your volume before starting.
Keep this page open. Sound may be delayed or unavailable if your device locks or your browser suspends the page.
Ninety minutes is the playing time of a football match's two halves, and a practical length for a long lesson, an exam or a focused work session.
Key takeaways
- 90 minutes is 1 hour 30 minutes, or 5,400 seconds.
- The countdown waits at 1:30:00 until you press Start.
- A football match is two halves of 45 minutes, so the 45 minute timer covers one half.
- Keep the tab open and Keep screen awake on for the whole countdown.
How do I set a 90 minute timer?
It is already set. Press Start and the display counts down from 1:30:00. Pick Soft chime or Clear beep under Sound & display and press Test sound before you begin. For a slightly different length, press Pause and Reset, enter the hours and minutes in the custom fields and press Set timer.
Why is 90 minutes such a common length?
Ninety minutes turns up in sport and in sleep research, and it is a practical length for one long piece of work.
| Area | Why 90 minutes | Source |
|---|---|---|
| Football | Two equal halves of 45 minutes | IFAB Laws of the Game, Law 7 |
| Sleep | REM sleep first occurs about 90 minutes after falling asleep | NINDS, Brain Basics: Understanding Sleep |
| Focus | Long enough for one big task with a short pause | Plan the pause before you start |
The sleep figure describes when the first REM stage begins. It is not a rule for how long a nap should be.
How can I use 90 minutes well?
- Kick-off timing: time each 45-minute half with the 45 minute timer, or run the full 90 here.
- A long lesson: 20 minutes of teaching, 50 of practice and 20 to review and pack up.
- An exam or mock paper shown full screen on the classroom board.
- Deep work: one task, notifications silenced, with a five-minute stretch at the halfway mark.
Will the alarm sound after an hour and a half?
It should, as long as the page stays awake. Browsers may pause or slow pages on a sleeping screen. Turn on Keep screen awake, keep the tab visible and plug in a phone that might run low. If the device locks anyway, the time left is still correct when you return, but the sound may have been delayed.
IFAB, Laws of the Game, Law 7 – The Duration of the Match: https://www.theifab.com/laws/latest/the-duration-of-the-match/ · NINDS (NIH), Brain Basics: Understanding Sleep: https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep · Checked 13 November 2026.
A rhythm for your focus ↗
Focus sessions, short breaks and a longer pause. Make the intervals your own.
Open Pomodoro timerTIME EVERYONE CAN SEEKeep the room on track ↗
A clear classroom countdown with an activity label and a quiet finish if you prefer.
Open classroom timerA timer for the time you have.
Pick a preset below. Need to count up instead? Our sister site Online Stopwatch times laps and split times in your browser, free and without an account.
Timing an exam? Try the Test Timer with warnings, extra time and a finish clock.
Countdowns
More timers and countdowns
FAQ
Can I add stoppage time?
Yes. Press +1 min during the countdown for each extra minute you need. The extra time applies only to this run; Reset brings the timer back to 1:30:00.
Can I show the 90 minutes as a circle?
Yes. Turn on Visual circle under Sound & display. A coloured disc shrinks from green to amber to red as the time runs out, which is easy to read from across a room.
Is there a timer for one half of a match?
Yes. The 45 minute timer opens at 45:00, which is one half under the Laws of the Game. For 2 hours, use the 2 hour timer.