How many days are between two dates?
By default the start date is day zero and the end date is excluded. Enable inclusive counting when both the start and end dates should be counted.
Calendar math
Days between dates calculator
Measure a date range as calendar years, months and days or as an exact total number of days.
Date difference
Result
Details
- Accuracy note
By default the start date is day zero and the end date is excluded. Turn on inclusive counting to include both boundary dates. Times and timezones are not used.
How to count days between two dates
- Enter the start date.
- Enter the end date.
- Choose whether to include the end date, then review calendar and total-day results.
Date-range uses
- Measure deadlines, trips, notice periods and project durations.
- Compare an exclusive range with an inclusive count of both boundary dates.
Common questions
What is the difference between calendar months and total days?
Calendar months follow actual month boundaries. Total days counts the exact number of midnights crossed, so it remains comparable across months of different lengths.
Does the calculation use timezones?
No. This tool compares date-only values, so daylight-saving changes and times of day do not alter the result.