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45 Minute Timer

45 minutes is a common length for a school lesson, a gym session and a block of deep focus. The alarm rings when three quarters of an hour are over.

Timer

45:00
Ready
Set the timer
Presets

Keyboard: Space start or pause, R reset

Runs on your device. Nothing you enter is sent to a server.

What a 45 Minute timer is good for

  • A lesson or tutoring session, with the time left visible to everyone in the room.
  • A gym session or a longer run.
  • A deep work block, followed by a 15 minute break.

Press Start and the countdown runs for exactly 45 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

Want to time something without an end point? The stopwatch counts up with lap times. For a date rather than a duration, the countdown timer counts the days and hours to an event.

Frequently asked questions

How many seconds are in a 45 Minute timer?

2,700 seconds. The 45 Minute timer counts them down from 45:00 and plays an alarm at zero.

Will the 45 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 45 Minute timer to a different length?

Yes. The hours, minutes and seconds fields and the presets work as usual. This page only starts at 45 minutes; every other length is one tap away, or open one of the timers linked below.