3 Hour Timer
Free online 3 hour countdown timer with alarm
Space start/pause · R reset · ↑↓ adjust
Quick Timers
Related Timers
About the 3 Hour Timer
Free 3 hour timer with alarm sound. Set a 3h countdown for work sessions, studying, or cooking. Runs in background with notifications 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 3 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 3 hour timer finishes
Frequently Asked Questions
How long is 3 hours in minutes?▾
3 hours is exactly 180 minutes or 10,800 seconds. Our free 3-hour countdown timer tracks every second and sounds an alarm when done.
What is a 3 hour timer used for?▾
A 3 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 3 hours?▾
Yes, an alarm sound plays automatically when the 3-hour countdown reaches zero. You can also enable push notifications for an extra alert, even if you’re in another tab.