Set 48 Hours Timer Online
Set timer for 48 Hours directly in your browser. This free online countdown clock counts down from 48 hours to zero and plays a loud alarm when time is up. To start the timer, simply click the Start button above.
Popular Uses
- 48-Hour Film Challenge - track your entire production timeline from brief reveal to final film submission in exactly 48 hours.
- 2-Day Deadline Sprint - count down from the start of a 2-day work sprint to a final project submission or client delivery.
- Lacto-Fermentation Timer - let lacto-fermented vegetables sit at room temperature for 48 hours before refrigerating.
- Hackathon Full Duration - official 48-hour hackathons use this exact window — start the timer the moment the theme drops.
- Post-Deploy Monitoring Window - track a 48-hour soft-launch observation period after deploying a new feature or product update.
Frequently Asked Questions
Does this 48 hours timer make a sound?
Yes. When the countdown reaches zero, the browser plays a short alarm chime. Keep the tab open and your device volume enabled.
Can I use this timer in full screen?
Yes. Use the full-screen button to turn the countdown into a large display for classrooms, workouts, meetings, cooking, or livestreams.
How many seconds is this timer?
This countdown is exactly 172,800 seconds long.
More Timer Durations
Need a different time? Select from our quick preset timers below.
Seconds:
Minutes: