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Fileraz
Tools
Fileraz
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Date & Time Calculator
Calendar arithmetic, reviewed October 2026 — weekends count unless a page says otherwise, and the sample holiday list is not an official gazette.
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A duration calculator breaks the gap between two date-times into total hours, leftover minutes, and seconds — the format shift rosters, logbooks, and timesheets need. From 1 January 2026, 09:00 to 17:30 the answer is 8 hours 30 minutes 0 seconds. Spans longer than a day fold into total hours (a 30-hour gap reads as 30h, not 1 day 6h), so multi-day tasks stay comparable.
Enter both endpoints with dates, not just times — an overnight shift from 22:00 to 06:00 needs the second date to be the next day, or the gap inverts. Keep both times in the same time zone; the tool measures the raw difference with no conversion. For billing, convert the result to decimal hours (8h 30m = 8.5h) with the time converter.
It does not convert between time zones, does not subtract breaks or apply overtime rules, and does not track a running stopwatch — it reports the raw gap between the two moments you typed.
Both times must share a zone — no time-zone conversion is applied.
Yes — a duration longer than 24 hours is still expressed in total hours, minutes, and seconds.
No. The calculation runs in the browser.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.