Weeks Between Dates Calculator
Calculate the weeks between two dates. See complete weeks, remaining days and total calendar days, including leap years, with our free calculator.
Your date result will appear here.
How to use this calculator
- Choose the start and end dates, then select Calculate.
- Read complete weeks and leftover days, or use Total days for the full interval.
How it works
The calculator counts Gregorian calendar days and divides by seven. It shows complete weeks plus remaining days, rather than rounding up to another week. The earlier date is included and the later date is excluded; matching dates give zero days.
Example
January 1 to January 18, 2026.
17 days = 2 complete weeks and 3 days. As a fraction, that is 17 ÷ 7, or approximately 2.43 weeks.
Common questions
Can I include both dates?
This tool excludes the later date. To count both endpoints, use Days Between Dates and select Include end date. January 1 through January 18 inclusive is 18 days.
What if I enter the dates in reverse order?
The result is the positive difference, with a note that the dates were reversed.
Do leap years change the calculation?
February 29 counts as a calendar day. February 28 to March 1, 2024 is 2 days; the same interval in 2025 is 1 day. Daylight saving time does not change these date-only counts.