Add days to a date
Calculate the resulting date when adding a number of days to a given date.
Processed on your device. Nothing is sent to any server.
New date
2026-09-18
Calculate the resulting date when adding a number of days to a given date. Useful for deadlines, due dates or delivery dates.
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.
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.
Related tools
- Age CalculatorCalculates exact age in years, months and days.
- Days Between DatesCalculates the days between two dates.
- Subtract Days from a DateSubtracts days from a date.
- Time Difference CalculatorCalculates the difference between two times.
- Average CalculatorCalculates the average of a list of numbers.
- Compound Interest CalculatorCalculates compound interest growth.