Days Between Dates Calculator
Count calendar days between two dates, with inclusive and exclusive options. See full weeks and remaining days instantly, free with no signup.
Your results
Calculation breakdown
- Days
- |end date − start date| in whole calendar days
- Weeks
- Days ÷ 7
Worked example
From 01/01/2026 to 26/01/2026 (Australia Day) is 25 days, or about 3.6 weeks.
Assumptions
- Uses each date's calendar day, which automatically accounts for leap years.
- The order you enter the two dates doesn't matter — the result is always the absolute difference.
How this calculator works
Enter a start date and end date in Australian DD/MM/YYYY format to see the total number of days between them, along with the equivalent in weeks and months. It's a quick way to check deadlines, anniversaries or how long ago something happened.
Count days between two calendar dates
The exclusive difference counts elapsed days from the start date to the end date. Inclusive counting adds the start date, which is useful when both the first and last day belong in the period.
The calculator also expresses the duration as complete weeks plus remaining days. Calendar-day results include weekends and public holidays unless you use the separate business-days calculator.
Choose the right counting convention
Deadlines, accommodation bookings, age calculations and legal periods can use different inclusion rules. Confirm whether the start day, end day or both should be counted before relying on the result.
Dates are interpreted as calendar dates rather than elapsed 24-hour blocks, which avoids daylight-saving clock changes altering the answer. For working-day deadlines, select the relevant Australian state holidays separately.
Frequently asked questions
Can the end date be before the start date?
Yes — the calculator shows the absolute number of days apart and notes which date comes first.
Does it count leap years correctly?
Yes, the calculation uses each date's actual calendar day, which automatically accounts for leap years.
Is the start date included in the count?
The result is the number of full days between the two dates, so the start date itself is not counted as a full day elapsed.
Editorial review and responsibility
Reviewed by the CalcAussie editorial team on 21 September 2026. Review scope: Method, Australian terminology, material assumptions, source links and user-facing limitations.
Calculator results remain estimates based on the figures entered. Check material decisions against current official information and report a suspected error so it can be reproduced and corrected.