About this 45 minute timer
A common institutional time block used in schools and clinics worldwide. Perfect for standard class periods, therapy sessions, and roasting chicken thighs.
Press start and the timer shows exactly when your 45 minutes will be up. It rings at zero, goes full screen for classrooms and kitchens, and remembers where it was if you refresh the page.
What people use a 45 minute timer for
- School class periods
- Therapy and coaching sessions
- Keynote talks
- Roast chicken thighs
45 minutes at a glance
| In seconds | 2,700 seconds |
|---|---|
| Halfway point | 22 minutes 30 seconds |
| Start now and it ends at | — |
How to use the 45 minute timer
- The timer is ready at 45:00. Tap Edit time to change it.
- Press Start Timer (or the space bar). The finish time appears under the digits.
- Press Full screen to fill the screen — handy for classrooms, meetings and kitchens.
- When it reaches zero an alarm plays until you press Stop Alarm.
Keyboard shortcuts
- Space start / pause
- R reset
- F full screen
- M mute
Frequently asked questions
How many seconds are in 45 minutes?
45 minutes is 2,700 seconds.
How do I set a 45 minute timer?
Press Start Timer — it is already set to 45:00. To change the length, tap Edit time, enter hours, minutes and seconds, then press Set. You can also add a minute at any point with +1 min.
Will the timer keep running if I refresh or close the tab?
Yes. The end time is saved in your browser, so reopening this page shows the correct time left. To hear the alarm, keep the tab open and your device's sound on.
Does the timer work on a phone?
Yes. It runs in any modern mobile browser with no app or sign-up, and it asks your phone to keep the screen awake while it runs.