Free online calculator
Date Difference Calculator
Find the calendar difference and exact elapsed days between two valid dates.
Free calculator
Date Difference Calculator
Enter your values to see the result.
Formula explained
The tool reports absolute elapsed days and a calendar breakdown in years, months and days from the earlier date to the later date.
Worked example
Choose any start and end dates, including dates in reverse order; the calculator identifies direction and computes the absolute interval.
Limitations and assumptions
Calendar months have different lengths. Total months are therefore an approximate comparison, while total elapsed days are exact for the entered dates.
Frequently asked questions
Are both boundary dates counted?
Elapsed days do not count both endpoints. A separate inclusive-days result adds one day.