Date Calculator
Calculate the days between two dates, or add/subtract days from a date.
Date Difference & Date Add/Subtract Calculator
Your Result
Two Ways to Calculate With Dates
Use Days Between Dates to find the exact duration between two calendar dates, shown in total days as well as years, months, and days. Use Add / Subtract Days to find what date falls a given number of days before or after a starting date — useful for deadlines, due dates, or contract terms.
Both modes account for leap years and varying month lengths automatically.
Frequently Asked Questions
Can I subtract days instead of adding?
Yes, enter a negative number in the 'Days to add' field, for example -30, to find the date 30 days before your start date.
Does the day count include both the start and end date?
The total days figure counts the number of full days between the two dates (end date minus start date), not an inclusive count of both endpoints.
Can I use this for business or working days only?
This calculator counts calendar days, including weekends and holidays. It does not currently filter for business days only.