Add days to a date
Calculate the resulting date when adding a number of days to a given date. Useful for deadlines, due dates or delivery dates.
Processed on your device. Nothing is sent to any server.
New date
2026-10-31
Adds the specified number of days to the starting date, correctly handling month and year rollovers.
Use cases
- Calculating the due date of a 30, 60 or 90-day term.
- Estimating a delivery date.
- Planning an event ahead of time.
How it works
- 1
Pick the starting date
Select the initial date.
- 2
Set how many days to add
Type the number of days and get the new date.
Technical details
- Example: 30 days after January 15, 2026 is February 14, 2026; 90 days after, April 15.
- Calendar days are counted: weekends and public holidays aren't skipped. For deadlines in business days, the real date will be later.
- Month and year rollovers and leap years are handled automatically. The result is shown as YYYY-MM-DD.
Frequently asked questions
Can I use negative numbers?
Yes, a negative number subtracts days instead of adding them; you can also use the dedicated subtract-days tool.
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