Add Days to Date
Add or subtract a number of calendar days from a chosen date.
Results are provided for general informational use. Verify important financial, health or legal figures before relying on them.
About this Add Days to Date
The Add Days to Date tool moves a calendar date forward or backward by a specified number of days. It is useful for deadlines, delivery windows, follow-up dates and quick schedule calculations.
For related tasks, try Date Difference Calculator, Business Days Calculator or Day of Year Calculator.
How the calculation works
The calculation uses calendar days, so weekends and ordinary holidays are included. The browser date object handles month and year boundaries automatically.
How to use it
- Choose the starting date.
- Enter a positive number to add days or a negative number to subtract days.
- Calculate to see the resulting date.
Practical example
Adding 30 days to 1 January 2026 gives 31 January 2026.
Frequently asked questions
Can I subtract days?
Yes. Enter a negative number.
Are weekends skipped?
No. Every calendar day counts.
Does it know public holidays?
No. This tool does not use a holiday calendar.
Keep exploring
View category →More Date & Time
Date Difference CalculatorFind calendar years, months, days and total days between two dates.Business Days CalculatorCount weekdays between two dates while excluding Saturdays and Sundays.Day of Year CalculatorFind a date’s ordinal day number within its year.Time Duration CalculatorFind elapsed hours and minutes between two clock times.Hours & Minutes to DecimalConvert hours and minutes into decimal hours.Decimal Hours to TimeConvert decimal hours into hours and minutes.