5 Hour Timer
Five hours is a long stretch for slow cooking, long-haul work sessions or a road-trip stop reminder. Press Start and it rings at zero, even if you switch tabs.
Space start/pause · R reset · F full screen
Alarm & notification settings
Sound needs one tap on the page first (a browser rule). Keep this tab open: closing it stops every timer’s alarm. Why timers stay accurate in background tabs.
What people time with 5 hours
- Low-and-slow cooking or proving dough overnight steps
- A long study or work marathon with planned breaks
- Parking or charging reminders
- Screen-time limits for a long day
5 hours in other units
| Seconds | 18,000 |
|---|---|
| Minutes | 300 |
| Hours | 5 |
| Share link | countdownpro.app/?t=5h |
Questions
How do I set a 5 hours timer?
Press Start on this page. The 5 hours countdown begins at once and rings when it reaches zero. You can also press the space bar to start and pause.
How many seconds are in 5 hours?
5 hours is 18,000 seconds (300 minutes).
Will it still ring if I switch to another tab?
Yes, while the tab stays open. The alarm is scheduled for an exact end time when you press Start, so a background tab does not delay it. Turn on notifications to get a system alert too.
Can I run this alongside other timers?
This page runs one big timer. For several at once, open the main countdown timer board, which runs any number of labelled timers side by side.