4-Hour Timer
Press start. It counts down to zero and rings an alarm — nothing to download, nothing to sign up for.
About this 4-hour timer
A one-click 4-hour countdown, most often used for slow cooking on high, parking and rental limits, or spacing reminders. It runs in your browser and rings when it reaches zero.
Four hours
Four hours is a long slow-cook window, a common parking or rental limit, and the time some medications are spaced apart. A browser timer is handy for these because it stays accurate in the background and rings when you're done.
4 hours in other units
| Seconds | 14,400 |
|---|---|
| Minutes | 240 |
| Hours | 4 |
| Milliseconds | 14,400,000 |
| Share of a day | 16.67% |
Tips for using a 4-hour timer
- Slow-cooker recipes often give 'high for 4 hours or low for 8' — the two settings are not interchangeable mid-way.
- For parking or rental limits, set the timer for a few minutes less than the actual limit.
- Keep the tab open and the device awake — some phones suspend browser audio when locked.
Frequently asked questions
How do I set a 4-hour timer?
Press Start above and the page counts down from 4 hours on its own — nothing to type. Need a little longer? Press +1 min while it runs, or pick a nearby duration from the list.
How many seconds are in 4 hours?
4 hours is 14,400 seconds — 240 minutes or 4 hours. That's 16.67% of a day.
What is a 4-hour timer good for?
People commonly use a 4-hour timer for slow cooking on high, parking and rental limits, or spacing reminders.
Will it keep time if I switch tabs?
Yes. The countdown is measured against your device clock rather than counting screen refreshes, so it stays accurate in a background tab and the alarm fires on time. For a timer this long, keep the device awake — some phones pause browser audio when locked.