Date Difference Calculator Guide
What is the Date Difference Calculator?
The Date Difference Calculator finds the precise time span between any two dates. It breaks the result down into years, months and days, and also shows aggregate totals including total calendar days, working days (Mon–Fri), complete weeks, weekend days, and total hours.
How to calculate it manually
Total days = (end date − start date) in milliseconds ÷ 86,400,000. Weeks = total days ÷ 7 (rounded down). Hours = total days × 24. Working days: loop through each date and count only Mon–Fri.
Frequently Asked Questions
Yes. Working days counts only Monday to Friday. Public holidays are not automatically excluded as they vary by country and year.
Yes. Entering a future end date shows you how many total days, working days, and weeks there are until that date.
Total hours = total calendar days × 24. This represents all hours including nights and weekends, not just business hours.
Calendar days count every day of the week. Business (working) days count only Monday through Friday, regardless of public holidays.