8 Hour Timer
Free online 8 hour countdown timer with alarm
Space start/pause · R reset · ↑↓ adjust
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About the 8 Hour Timer
Set a free 8 hour timer online with alarm. Great for overnight countdowns, long events, or sleep tracking. Background alerts on any device.
Common Uses
- Deep work session
- Meeting duration
- Exam practice
- Project time-box
- Study block
How to Use
- Click Start to begin your 8 hour countdown
- Use the +/- buttons to adjust by 5 minutes while running
- Press Space to start/pause, R to reset your timer
- Enable notifications for alerts when your 8 hour timer finishes
Frequently Asked Questions
How long is 8 hours in minutes?▾
8 hours is exactly 480 minutes or 28,800 seconds. Our free 8-hour countdown timer tracks every second and sounds an alarm when done.
What is a 8 hour timer used for?▾
A 8 hour timer is commonly used for deep work session, meeting duration, exam practice. Set the countdown and focus on your task with confidence.
Does the timer work in the background?▾
Yes, our timer continues running even if you switch to another tab or minimize your browser. Enable push notifications to get alerted when your countdown finishes.
Will the alarm sound after 8 hours?▾
Yes, an alarm sound plays automatically when the 8-hour countdown reaches zero. You can also enable push notifications for an extra alert, even if you’re in another tab.