Date Tools
Date Difference Calculator
Find the exact difference between two dates. Get the result in years, months, weeks, days, hours, minutes, and seconds, plus the number of working days.
How it works
Select a start and end date. The calculator computes the exact span in multiple units. Working days count Monday through Friday, excluding weekends. For holiday-aware working day counts, use the Work Days Calculator.
Frequently asked questions
How are working days counted?
Working days exclude Saturdays and Sundays. Public holidays are not excluded by default — use the Work Days Calculator for holiday-aware results.
Can I calculate the difference between past dates?
Yes. You can enter any two dates regardless of whether they are in the past, present, or future.
What if end date is before start date?
The calculator shows the absolute difference either way. A note is shown if the dates are in reverse order.
How many days between Jan 1 and Dec 31?
364 days in a non-leap year, 365 in a leap year.