How to use the Date Calculator
- Choose a mode.
- Enter dates or the number of days.
- Read the result.
How it works
Useful for deadlines, notice periods, project planning, pregnancy and contract terms. Calendar days are counted, including weekends.
Worked example
From 6 Nov 2026 to 4 Feb 2027 is 90 days (12 weeks and 6 days).
Good to know
The result also shows the weekday of the resulting date.
Frequently asked questions
The count is the difference; add 1 for an inclusive count.
Yes, enter a negative number.
Results are estimates for information only and are not financial, tax or legal advice.