Days Between Dates Calculator
Calculate the number of days between two dates, with exclusive or inclusive counting, weeks, calendar years/months/days and weekday/weekend totals.
Date difference calculator
In different units
Calendar breakdown
Exact calendar difference accounting for variable month lengths and leap years.
Weekdays and weekends
Weekday counts follow the end-date inclusion setting. Holidays, observed holidays, and shortened workdays are not included.
Find the number of days between two dates
The default days-between calculation is exclusive: it subtracts the start date from the end date. Turn on inclusive counting when you need to include the end date in the span.
Exclusive mode returns 0 for the same start and end date. Inclusive mode adds one day when both dates should count.
What the calculator shows
- Total calendar days between the selected dates.
- Weeks, hours, minutes and seconds as equivalent durations.
- Calendar years, months and days for a human-readable breakdown.
- Weekdays and weekends, without holiday calendars.
- A separate add/subtract date mode for quick future or past date checks.
Frequently Asked Questions
Sources and References
- DateMDN Web Docs
- Representing dates and timesMDN Web Docs
- Gregorian calendarBritannica
- International System of Units: secondNIST
Calculations are based on the listed reference sources. Links open in a new tab.
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