Date Difference Calculator
Enter two dates to see exactly how much time is between them.
About this calculator
This is useful for figuring out project timelines, ages of documents or contracts, days until a deadline, or the exact length of a trip. It counts full elapsed days between two calendar dates, accounting for varying month lengths and leap years automatically.
Does this count the start and end date as one day or two?
The main result counts full elapsed days between the two dates, so choosing the same date for both gives zero days. The "inclusive" count in the breakdown adds one day, which is useful for questions like how many days a booking or event spans.
Can I calculate a date in the past or the future?
Yes — enter any two dates in either order. The calculator automatically works out which is earlier and shows the difference as a positive value.