Days Between Dates Calculator
Work out the exact number of calendar days, weeks and months between any two dates using the Australian DD/MM/YYYY format.
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.
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.