Date Time
How Long Until Calculator
Show days, hours, and minutes remaining until a target.
Free to use — no sign-up or login.
Result
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How long until takes a date and a time and splits the remaining duration into days, hours, and minutes. It is the clock-time countdown. It is not a count of calendar midnights and it is not a ticking age.
For a date with no clock, use the Days Until Calculator. For age that keeps moving, use the Live Age Calculator.
The pieces are days, hours, and minutes
A target of 1 January 2027 at 00:00, read when the clock is 13 November 2026 at 15:00, is 48 days, 9 hours, and 0 minutes. The page does not also print seconds. Refresh the page if you need the count against a later minute.
A past target is elapsed, not negative
If the target is already behind the device clock, the result uses the same day, hour, and minute pieces and adds “ago.” The label changes to time elapsed. You do not have to read a leading minus.
Worked example: 1 January 2027 at 00:00
If now is 13 November 2026 at 15:00 and the target is 1 January 2027 at 00:00, the remaining time is 48d 9h 0m. A target already in the past uses the same pieces followed by ago.
\[ 48\,\mathrm{d}+9\,\mathrm{h} \]
Frequently asked questions
Does this count only calendar days?
No. It includes the hours and minutes between now and the target time.
What if the event already happened?
The result says how long ago it was, in days, hours, and minutes, instead of a negative duration.
Are seconds shown?
No. The smallest unit is the minute. A ticking seconds display is the Live Age page, and only for age.
Which clock is “now”?
The browser’s local clock. This page does not convert the target into another city.
How do I ignore the time of day?
Use Days Until and pick a date. Today then counts as 0 calendar days.
References
Assumptions and limitations
The countdown uses the device clock and stops at minutes. It does not tick every second, convert time zones, or compute age.