Add or Subtract Days Calculator

Determine a future or past date by specifying a starting date and the number of days you want to add or subtract.

Add or Subtract Days

Enter a date and number of days to calculate

How This Tool Helps

  • Scheduling & Deadlines: Find the exact date for a deadline that is, for example, 30, 60, or 90 days from today.
  • Follow-Ups: Calculate the date for a follow-up appointment or task that needs to happen a certain number of days after an initial event.
  • Historical Dates: Determine the date that occurred a specific number of days before a known historical event.
  • Warranty & Returns: Calculate the end date for a warranty period or return window based on the purchase date and duration in days.
  • Personal Planning: Plan vacations or milestones by adding days to a starting date.

Select your starting date, enter the number of days you wish to add or subtract, choose the operation (Add or Subtract), and the calculator will show you the resulting calendar date.