45 Minute Timer (45 Min Timer)
Free online 45 minute countdown timer with alarm
Set a 45 minute countdown for classes, meetings, workouts, baking, or focused study. Works as a 45 min timer or timer 45 minutes with sound alerts.
Space start/pause · R reset · +− adjust
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Embed this timer
Paste this into any page — a class blog, a lesson plan, a meeting agenda — and visitors get a working 45 minute timer with no script tag, no account and no tracking. Please keep the credit link.
About the 45 Minute Timer
A 45 minute timer that keeps counting in a background tab, shows the clock time it will finish at, and sounds an alarm at zero. Fullscreen for a class or meeting room, with optional rain or brown noise while it runs. No ads, no signup.
TimerHub calculates remaining time from an absolute finish timestamp, so missed browser callbacks do not create drift. Read the timing accuracy methodology and reproducible tests.
Common Uses
- Class period
- 45-minute meeting
- Long workout
- Baking time
- Extended focus session
- Study block
How to Use the 45 Minute Timer
- Click Start (or press Space) to begin your 45 minute countdown
- Press Space again to pause and resume, or R to reset the timer
- Use the +/- buttons to adjust by 1 minute while running
- Toggle Repeat to loop the countdown automatically, and watch the finish time under the display
- Use the Fullscreen control below the timer for a large full-screen countdown (Esc to exit)
- Pick a background sound — rain, ocean, fireplace or brown noise — that fades out at zero
- Choose or mute the alarm sound from the sound settings in the header
- Add
?autostart=1to the link to start the countdown on load - Enable notifications for alerts when your 45 minute timer finishes, even in a background tab
Frequently Asked Questions
How long is 45 minutes?▾
45 minutes is exactly 2,700 seconds, or 0.8 of an hour. Our free 45-minute timer counts down precisely and alerts you when time is up.
Is this the same as a 45 min timer?▾
Yes. This page is a 45 minute timer, 45 min timer, and timer for 45 minutes with the same browser alarm and countdown controls.
What can I do in 45 minutes?▾
A 45 minute timer is great for class period, 45-minute meeting, long workout. Set it and focus on your task — the alarm will let you know when time is up.
Does the timer work in the background?▾
Yes, our timer continues running even if you switch to another tab or minimize your browser. Enable notifications to get alerted when it finishes.
Does the alarm sound when the timer finishes?▾
Yes, an alarm plays automatically the moment the 45 minute countdown reaches zero, with an optional vibration on mobile. Enable notifications for an extra system alert, even from a background tab.
Can I make the timer fullscreen?▾
Yes, use the Fullscreen control below the timer to expand the countdown to your whole screen — great for classrooms, presentations, and workouts. Press Esc to exit fullscreen.
Can I use the 45 minute timer on my phone?▾
Yes, our 45 minute timer is fully responsive and works on all devices including iPhone and Android. Open this page in your mobile browser and tap Start.