How to count days between dates
Pick a start and end date.
1
Choose the start
Use the first day of the period.
2
Choose the end
Use the final day or deadline.
3
Read the difference
Use the inclusive count if both boundary days should be included.
What does this tool do?
This calculator counts the calendar days between two dates. It also shows the inclusive count, full weeks and how many weekdays fall in the range, which is useful for deadlines, holidays and project planning.
The Formula
Days = End date − Start dateFrequently Asked Questions
Are both dates included?
The main result is the difference between dates, so the start date is not counted. The inclusive count adds one day.
Does this account for daylight saving?
Dates are normalised to midnight local time, so the day count is not affected by a one-hour clock change.