Countdown Calculator
Show the exact days, hours, minutes, and seconds until a future moment — or elapsed since a past one.
Count down to any date and time or measure time elapsed since. Free online countdown calculator with days, hours, minutes and seconds.
Calculator Inputs
About Countdown
Show the exact days, hours, minutes, and seconds until a future moment — or elapsed since a past one.
Pick a date, optionally a time and a label, and choose the direction. Countdown mode measures forward to the moment; elapsed mode measures backward from now. Both break the gap into days, hours, minutes, and seconds, and flip the status line when the moment passes.
Times use your device timezone. Reopen the page for a fresh reading — the static result is a snapshot, not a ticking clock.
Everything computes locally in your browser.
Where it is used
Launch countdowns, exam and deadline tracking, anniversary and age calculations, and SLA elapsed-time checks.
How to use the Countdown
- Event Name (optional) — enter the value (e.g. Product launch).
- Target Date — enter the value.
- Target Time HH:MM (optional) — enter the value (e.g. 09:00).
- Direction — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Formula
Difference = target − now (or now − target for elapsed), split into d/h/m/s.
Examples
Example
Frequently Asked Questions
- Does the countdown tick live?
- No — this calculator takes a snapshot at calculation time. Press Calculate again (or reload) for an updated reading.
- Which timezone is used?
- Your device timezone for both now and the target. For cross-timezone events, convert first with a timezone converter.
- What is elapsed mode for?
- Measuring how long ago something happened — uptime since a deploy, age of an account, or days since a milestone.