Countdown Calculator
Count live time until a date and time, or elapsed time since an event
Calculation Steps
How Countdown Time Is Calculated
The page compares your target date and time against the current local clock.
Live seconds
The result updates every second while the page is open, so it can be used as a simple event countdown.
Local time zone
Date and time inputs are interpreted in the browser's local time zone. Convert the event time first if the event is in another region.
Shareable links
Mode, target date, and target time are stored in the URL, making it easy to share the same countdown setup.
Countdown Examples
Common ways to use a countdown or elapsed-time calculation.
Event countdown
Set the target date and time for a launch, trip, wedding, deadline, or livestream.
Elapsed time
Switch to since mode to see how much time has passed after a milestone.
Weeks and days
Use total days and weeks plus days when planning longer timelines.
Countdown Calculator FAQ
Common questions about countdowns, elapsed time, time zones, and shareable links.
Does the countdown update automatically?
Yes. The calculator refreshes the displayed countdown every second while the page is open.
Which time zone does the countdown use?
It uses the browser's local time zone for the target date and time. Check your device time zone when planning events in another region.
What happens after the target time passes?
The calculator keeps counting and labels the result as time since the target passed, so the page still works after the event.
Can I share a countdown link?
Yes. The selected mode, target date, and target time are stored in the URL as shareable parameters.
Is this the same as the date calculator?
No. The date calculator works with calendar dates. The countdown calculator includes clock time and live seconds.