What you can do
- Days between dates — see the gap as years/months/days and as total days and weeks.
- Add or subtract days — pick a start date, add or remove a number of days, and get the resulting date.
Common uses
- Counting down to an event, deadline or due date.
- Working out a date a set number of days away (e.g. a notice period).
- Measuring how long ago something happened.
Frequently asked questions
How do I count the days between two dates?
Enter a start and end date and the calculator returns the gap as years, months and days, plus the total number of days and weeks. It uses the real calendar, including leap years.
Can I find a date in the future?
Yes. Switch to "Add or subtract days", choose a start date and a number of days to add, and the calculator shows the resulting date and weekday.
Are leap years handled?
Yes. Calculations use actual calendar dates, so 29 February in leap years is counted automatically.