45 Minute Timer
Free online 45 minute countdown timer with alarm
Space start/pause · R reset · ↑↓ adjust
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About the 45 Minute Timer
Start a free 45 minute timer with alarm. Ideal for meetings, workouts, and deep focus. Background alerts and fullscreen on all devices.
Common Uses
- Class period
- Long workout
- Baking time
- Extended focus session
How to Use
- Click Start to begin your 45 minute countdown
- Use the +/- buttons to adjust by 1 minute while running
- Press Space to start/pause, R to reset your timer
- Enable notifications for alerts when your 45 minute timer finishes
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.
What can I do in 45 minutes?▾
A 45 minute timer is great for class period, long workout, baking time. 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.
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.