Add or Subtract Days From a Date

Add or subtract a number of days from a date to find the resulting date.

Resulting date

Saturday, 17 October 2026

Your file never leaves this browser tab — everything runs locally on your device.

How to use add or subtract days from a date

  1. Pick "Add days" or "Subtract days".
  2. Choose a start date and enter the number of days.
  3. Read the resulting date, shown with the full weekday name.

Common use cases

  • Working out a due date a set number of days from today.
  • Finding what date it was a certain number of days ago.
  • Calculating delivery, warranty or deadline dates.

Related tools

Frequently asked questions