Date Difference Calculator
Find the exact difference between any two dates — in years, months, and days (like age calculation), as total days, total weeks, or total months. Also shows the day of the week for the end date and how far it is from today.
Frequently Asked Questions
How do I calculate the number of days between two dates?+
Subtract the earlier date from the later date. The exact count varies depending on whether leap years are included. This calculator accounts for all leap years and variable month lengths to give you the precise day count.
What is the difference between calendar days and business days?+
Calendar days include all days (including weekends and holidays). Business days (or working days) exclude Saturdays, Sundays, and public holidays. This calculator shows calendar days. For business days, subtract roughly 2/7 of the total (about 28–30% of calendar days).
How are years, months, and days calculated?+
The Y/M/D breakdown counts complete calendar units. For example, from Jan 31 to Mar 1: the month of February doesn't complete from the 31st (since Feb has ≤28/29 days), so the calculation borrows from the previous month — resulting in 0 years, 1 month, and a few days rather than exactly 2 months.