Duration Calculator
About the Duration Calculator
A project phase might run two years, three months, seventeen days, and six hours; a rental gap might be one month and a handful of hours between checkout and check-in timestamps. When stakeholders want human-readable decomposition-not just a single millisecond total-you need a duration calculator that walks the calendar. It complements the slimmer time-duration calculator: use that one for quick elapsed hours on a shift, use this one when contracts, SLAs, or narratives require a full ladder of units. Enter precise start and end moments so partial days count correctly.
How to use it
- Enter the start date and time with as much precision as needed.
- Enter the end date and time.
- Click Calculate breakdown for the full multi-unit span.
- Read years, months, days, hours, and minutes in the result.
- Copy the structured breakdown into reports or emails.
Good to know
Results are calendar math from the dates you enter. Business-day tools skip weekends when they say so. They do not know local holidays unless the page says they do.
Frequently asked questions
Is the Duration Calculator free?
Yes. You can use it in your browser with no account and no download.
What units does the duration calculator return?
Years, months, days, hours, and minutes between the two date-times.
When should I use duration vs time-duration?
Use duration for full breakdowns; use time-duration for compact hours-minutes-seconds elapsed totals.
Does it include seconds in the headline?
Headline focuses on minutes; sub-minute precision may appear in detail chips.
Can spans cross years and leap days?
Yes. Calendar rules handle February 29 and varying month lengths.
Related
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