Date Difference Calculator
Find the exact number of days, weeks and months between two dates.
How to use Date Difference Calculator
- 1Enter a start date and an end date.
- 2Click Calculate.
- 3See the difference broken down into years/months/days plus total days and weeks.
Why use this tool
- Useful for deadlines, countdowns, contracts and project planning.
- Breaks the difference into multiple useful units at once.
- Works with dates in either order — it always shows a positive difference.
Frequently asked questions
Does the calculation include both the start and end date?
The day count is the number of full days between the two dates (exclusive of one endpoint), matching how 'days until' countdowns are typically calculated.
Can I use this for future dates, like a countdown?
Yes — enter today's date as the start and any future date as the end to get a countdown in days.