QUICK GUIDE
Count days between two dates
Select a start date and an end date. The calculator finds the number of calendar days between them and also shows the equivalent in weeks.
FREE ONLINE CALCULATOR
Date Difference Calculator
Count the days and weeks between two dates for a trip, project, deadline, or special occasion. Choose whether to count both the start and end date.
Open the date difference calculatorNo account needed. Your calculation stays in your browser.
QUICK GUIDE
Choose inclusive date counting
By default, the result counts the elapsed days between dates. Turn on “Count both the start and end date” to include both calendar dates in the total.
QUICK GUIDE
Calendar-aware date math
Dates are treated as calendar days in your local browser rather than fixed 24-hour periods, avoiding daylight-saving changes affecting the count.
COMMON QUESTIONS
About the date difference calculator
Is the end date included in the count?
By default, no: the result is the elapsed number of days. Enable the inclusive option to count both the start and end dates.
Can I enter dates in either order?
Yes. The calculator returns the absolute difference, regardless of which date comes first.
Does the calculation work across leap years?
Yes. It counts calendar days, including February 29 in leap years.