Formula and example
The total-day result subtracts the UTC date values to avoid daylight-saving time shifts. For example, January 1 to January 31 is 30 days, or 31 days when the end date is included.
Calculators & Converters
Date Difference Calculator
Calculate the number of days, weeks, months, and years between two calendar dates directly in your browser.
Browser toolActive
No account or server processing required.
Calculator
Calculate days between two dates
Pick a start and end date to calculate total days, weeks, and a calendar-style years/months/days difference.
Total difference30 days
4 weeks and 2 days
Calendar difference0y 1m 0d
2026-06-01 to 2026-07-01
Direction
The end date is after the start date.
Local processing: Your dates are calculated in your browser. They are not uploaded to our server.
How to use this date difference calculator
Select a start date and an end date. The calculator returns the absolute difference in total days, a weeks and days breakdown, and a calendar-style years, months, and days result.
Trip planningProject timelinesEvent countdownsCalendar checks
Internal links
This date calculator is part of the calculators and converters collection for quick planning and everyday math.
FAQ
Does the calculator include the end date?
By default, it does not include the end date. Turn on Include end date when you want both the start and end calendar days counted.
What happens if the end date is before the start date?
The calculator shows the absolute difference and notes that the end date is before the start date.
Are my dates uploaded?
No. The dates are calculated locally in your browser and are not sent to a server.
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