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Date Difference
Count the days, months or years between two dates.
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Processed locallyAbout Date Difference
Counts days, weeks, months and years between two dates, with an option to include both endpoints.
- 1
Two local timestamps in, five ways of reading the **elapsed time**: total days, hours, minutes, seconds and weeks (two decimals). Every number is a total, not an "X days Y hours" breakdown.
- 2
Direction does not change the maths: when the end is earlier than the start it says so and still reports absolute values.
- 3
The conversion uses milliseconds, with 24 hours to a day, so a span across a daylight-saving switch comes out one hour off from the calendar day count.
- 1
Set start and end
Use the browser date-time pickers; both are interpreted in your local time zone.
- 2
Press Calculate difference
All five totals appear at once, with a note on direction.
- 3
Swap when needed
Swapping the two ends recalculates with them exchanged.
There is no inclusive-counting here: it measures elapsed time between two **instants**, not a calendar span. For calendar days ("1st to 3rd is three days"), add one day to the result.
No. This reports pure elapsed time; excluding weekends and holidays needs a working calendar and regional rules, which is out of scope — use a dedicated business-day calculator.
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