Date Calculator
Calculate differences between dates or add/subtract time periods.
What this tool does
- Difference: days, weeks, months, years between two dates
- Business days: weekdays excluding weekends
- Add/subtract: shift a date by days, weeks, months, or years
Common use cases
- Project deadline calculations
- Counting days until an event
- Age calculations
- Contract end dates
Privacy
Everything runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What can this tool do?
Two modes: (1) difference between two dates in years/months/days/weeks, (2) add or subtract days/weeks/months/years from a date.
Does it count weekdays only?
It shows both total days and business days (weekdays excluding weekends). Public holidays are not excluded.
Is it free?
Yes, completely free.
Does it handle time zones?
It uses your local timezone. For most use cases, this is what you want.
Can I add months or years?
Yes. Choose 'months' or 'years' as the unit.