Date Difference Calculator
Calculate the exact number of days, weeks, months, and years between any two dates
Add / Subtract Days from a Date
Date Difference Calculator
Our Date Difference Calculator lets you instantly find the exact duration between any two dates in multiple units simultaneously — days, weeks, months, and years. This is essential for project management, event planning, legal calculations, tracking anniversaries, or simply satisfying curiosity about time spans.
Add or Subtract Days
The second calculator on this page lets you add or subtract a specific number of days from a starting date. This is useful for finding deadlines (e.g., what date is 90 days from today?), calculating expiration dates, scheduling events relative to a reference date, or working with payment terms.
Business Days Consideration
This calculator counts calendar days. If you need to count business days (excluding weekends and holidays), note that the raw day count will include Saturdays and Sundays. For a rough estimate, multiply the number of weeks by 5 and add the remaining weekday count. For precise business day calculations in your jurisdiction, consider consulting a business-specific calendar tool.