45 Minute Timer

Press Start for a 45-minute countdown. Nine blocks each stand for 5 minutes, and the alarm rings at zero until you stop it.

Set: 45 min

Picture

Numbers

Hide leaves only the picture, for a class. Screen readers still hear the time.

45:00Ready

9 blocks · 1 block = 5 minutes

Alarm sound

Keys: Space start/pause · R reset · F full screen · M mute · Esc stop alarm

Quick times

Tip: The blocks turn orange in the last 9 minutes and red with stripes in the last 2 minutes 15 seconds.

Good uses for a 45 minute timer

  • A school lesson or a half of a football match (45 minutes each half)
  • A deep-work or study session
  • Baking or roasting
  • A gym session
  • A meeting slot
  • A long reading block

Tips

  1. The blocks turn orange in the last 9 minutes and red with stripes in the last 2 minutes 15 seconds.
  2. For study with breaks, try the Pomodoro timer.
  3. Press +1 min for stoppage time.

45 minutes in other units

Unit45 minutes
Minutes45
Seconds2,700
Hours0.75
Milliseconds2,700,000

Questions and answers

How many seconds is 45 minutes?

2,700 seconds, or three quarters of an hour (0.75 h).

How long is a half in football (soccer)?

Law 7 of the IFAB Laws of the Game says: "A match lasts for two equal halves of 45 minutes" (read 9 November 2026). The referee can add time for stoppages.

Does the timer keep running if I switch tabs?

Yes. TimerNook works out the time left from your device clock and a fixed end time, not by counting ticks, so a background tab is still right. While a timer runs, the page also plays a tone too quiet to hear, so the browser keeps the tab awake; your browser may show a speaker icon on the tab. If you also tick "Notify me", you get a system notification at the end.

Will the alarm ring if my phone screen locks?

Not always. Phone browsers can pause web pages when the screen locks, and an iPhone on silent can mute browser sound. Keep the screen on; while the timer runs TimerNook asks the browser to keep the screen awake where that is supported. If the page was paused, the alarm rings as soon as you return.

Other timers

Created by Saad Danish. Checked that the countdown, alarm and full screen work on this page before release.
Last updated 13 November 2026.