Days Between Dates Calculator
Calculate the exact number of days between two dates, including an optional count of both the start and end dates.
Calculate Days Between Two Dates
Enter the start and end dates to instantly find the number of days between them.
This calculator finds the number of calendar days between two dates. It can also include both dates when you need an inclusive day count.
How to Calculate the Days Between Two Dates
Enter the start date and end date, then click Calculate Days. The calculator determines the calendar-day difference between the two dates and displays the result instantly.
What Does “Days Between Dates” Mean?
The number of days between two dates is the calendar-day difference separating them. For example, the difference between Monday and Tuesday is one day.
Inclusive vs. Exclusive Date Counting
An exclusive calculation measures the difference between the dates without counting the starting date as an additional day. An inclusive calculation counts both the start and end dates.
Are Weekends Included?
Yes. This calculator counts calendar days, so Saturdays and Sundays are included. If you need to count weekdays only, use the Working Days Calculator.
Common Uses for a Days Between Dates Calculator
Calculating days between dates can help with project timelines, event planning, contract periods, delivery schedules, vacation planning, deadlines, anniversaries, and date-based reporting.
Frequently Asked Questions
How many days are between two dates?
Enter the two dates in the calculator above and it will automatically calculate the number of calendar days between them.
Does the calculator include the start date?
By default, the calculator measures the difference between the dates. Enable the inclusive option when you want both the start and end dates counted.
Does the calculator include weekends?
Yes. The calculator counts calendar days, including Saturdays and Sundays.
Can I calculate the days between dates across different years?
Yes. You can enter dates from different years and the calculator will account for the correct number of days, including leap years.
What is the difference between calendar days and working days?
Calendar days include every day of the week. Working days normally exclude Saturdays and Sundays.
Can I use this for project planning?
Yes. It can help calculate project durations, milestone intervals, deadlines, delivery periods, and other date-based timelines.