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InfoJano › Date Calculator › Add or Subtract Days
JAN01
MAR15
FREE ONLINE TOOL
Add or Subtract Days from a Date
Find a future or past date in just a few simple steps.
Add DaysSubtract DaysWeeks & MonthsResulting Weekday
Free Add or Subtract Days
Move forward or backward from a starting date. Choose whether to add or subtract days, weeks, months or years and find the resulting calendar date and weekday.
Subtract Time
Calculate a date in the past from a starting date.
Calendar Rules
Handle month ends and leap-year dates.
See Weekday
Know which day of the week the result falls on.
How to Use This Calculator
Choose a Date
Enter the date you want to start from.
Select Direction
Choose Add or Subtract.
Enter an Amount
Set the number of days, weeks, months or years.
View New Date
Review the resulting date and weekday.
How to Add Days to a Date
Choose a starting date, select Add and enter the amount. The result shows the new calendar date and its weekday. You can also add weeks, months or years.
How to Subtract Days from a Date
Choose a starting date, select Subtract and enter the amount. The calculator moves backward by the selected calendar amount.
Month Ends and Leap Years
Calendar months have different lengths. When adding a month near the end of a longer month, the result adjusts to the last valid day in the target month.
Popular Add or Subtract Date Questions
What date is 30 days from today?
Choose today's date as the starting date, select Add, enter 30 and choose Days. The calculator returns the future date and the day of the week. Change the number to find a date 7, 10, 14, 60 or 90 days from a date.
How do I find a date 30 days ago?
Enter the date you want to count back from, select Subtract and enter 30 days. You can also add or subtract weeks, months or years when planning deadlines and schedules.
Can I add months to a date?
Yes. Select Months or Years and enter the amount. Calendar month lengths differ, so dates near the end of a month adjust to the last valid day in the target month.
This free add days to date calculator can help with due dates, reminders, return dates, project deadlines, travel planning, billing cycles and everyday date calculations.
Frequently Asked Questions
How do I calculate a date 30 days from today?
Use the starting date, choose Add and enter 30 days to calculate the future date.
Can I subtract days from a date?
Yes. Select Subtract, enter the amount and calculate the earlier date.
Does it show the day of the week?
Yes. The resulting date is displayed with its weekday.
What happens when adding one month to January 31?
The result adjusts to the last valid date in February because February does not have 31 days.