Countdown Timer
Set a target date and time and watch a live countdown in days, hours, minutes, and seconds — great for launches, deadlines, and events.
Countdown Timer
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View on AmazonHow the Countdown Timer works
- Enter the target date and time you're counting down to.
- The countdown starts automatically and updates live.
- Keep the page open to watch it tick down in real time.
Formula / logic
Time remaining = Target date/time − current date/time, displayed as days, hours, minutes, and seconds and updated every second.
Worked example
Setting a target of December 31 at midnight from September 6 shows a live countdown starting around 116 days.
Frequently asked questions
Does the countdown keep running if I leave the page open?
Yes, it updates live every second as long as the page stays open in your browser.
Does the countdown keep running if I close the tab?
No — it only runs while the page is open in your browser; reopening the page recalculates the remaining time from your device clock.
Can I use this to count down to a recurring event, like a birthday?
Yes, just re-enter next year's date once the current countdown finishes.
Is the Countdown Timer free to use?
Yes — every calculator on this site is free, with no sign-up or download required.
Does the Countdown Timer work on mobile?
Yes, the layout and calculator both adapt to phone and tablet screens.