45 Minute Timer

  • Set Sound
  • Set Time
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Using the 45 minute timer

Three quarters of an hour, counted for you: the 45 minute timer runs down and plays an alarm when it reaches zero. Start it and the page shows the exact finish time, so a 1:20 PM start reads "ends at 2:05 PM".

What 45 minutes is used for

SituationTip
Class testPress F for full screen. The classroom timer has a 45-minute Test preset with a custom end message.
Exam practiceThe exam timer adds warnings at 30, 10 and 5 minutes left.
Workout or classPick a loud sound like Emergency so you hear it over music.
Lunch breakStart it as you leave your desk and you'll know exactly when to be back.
Long meditationThe meditation timer has a 45-minute preset with optional interval bells.

How to use it

  1. Press Start or Space.
  2. Choose a sound and confirm mute is off.
  3. Pause with Space if you're interrupted; press R to start over.

Keep it running for the full 45

The countdown stays accurate in a background tab because it uses your system clock. Leave the tab open – the alarm can't play once the page is closed. On a phone, plug in if you can; the page asks the browser to keep the screen awake, but not every mobile browser allows it.

FAQ

Is there a 45 minute timer with music? The timer itself doesn't play music, only the end alarm. Run your playlist in another app alongside it.

Can I see the time left without switching tabs? Yes, the remaining time appears in the browser tab title.