12 Hour Timer

1. Click “Start” to begin the 12-hour countdown.
2. An alert will notify you when 12 hours have elapsed.
3. Use the “Pause” button to temporarily halt the 12 hour timer.
4. Click “Reset” to restart the timer at 12 hours.
5. Adjust the duration using the dropdown menus for hours, minutes, and seconds.
6. Toggle sound alerts using the “Sound” button.
7. Enter fullscreen mode by clicking the “Fullscreen” button.

1. Half-day events: Timing half-day conferences or events.
2. Overnight cooking: For dishes needing extended cooking or marinating.
3. Travel planning: Managing extended travel times or layovers.
4. Day-long projects: Completing a significant home or creative project.
5. Work and socializing: Balancing a workday with social activities.

In 12 hours…

• Twelve hours is the duration of one half of the Earth’s rotation, marking a shift from AM to PM or vice versa.
• A full day trip to a nearby city and back.
• Slow-cooking meats to tender perfection.

A 12-hour timer is equivalent to:

• 720 minutes
• 43,200 seconds
• 43,200,000 milliseconds

For a comprehensive time equivalent, including microseconds, nanoseconds, days, weeks, months, and years, please visit our Time Conversion Tool.