Add and Subtract Days from Date

Add or subtract days, weeks, months, or years from any date. Get the resulting date instantly.

Add and Subtract Days from Date tool

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Example

Input: Start date 2026-01-15, add 90 days

Result: Wednesday, April 15, 2026 (2026-04-15)

16 days to Jan 31, 28 in February, 31 in March and 15 in April add up to 90 days.

  1. Enter your starting date using the date picker or type it directly into the input field.
  2. Choose Add or Subtract from the Operation dropdown to set the direction of the calculation.
  3. Enter the number of days, weeks, months, or years you want to add or subtract - you can combine multiple units in one calculation.
  4. View the resulting date displayed instantly, along with the day of the week it falls on.
  5. Copy the calculated date for use in contracts, project timelines, or deadline tracking.

Finding a Date Days, Weeks or Months Away

Add or subtract days, weeks, months or years from a start date to find the date you land on. For example, 90 days after January 15, 2026 is Wednesday, April 15, 2026. You get the result as a full date, in ISO format (2026-04-15), with its weekday.

You can mix units in one go, such as 1 year, 2 months and 10 days. Years and months are applied first, then weeks and days. The order matters near the end of a month. Adding 1 month to January 31 gives February 28, or February 29 in a leap year, because February has no 31st. The tool stops at the last day of the month instead of spilling into March. February 29 plus 1 year gives February 28.

Days here are calendar days, so weekends and holidays count. That fits things like a 30-day return window, a 90-day visa stay or a due date. The result also tells you how many days it is from today and whether it lands on a weekend. That helps when a deadline falls on a Saturday. Choose Subtract to go back in time, for example to find the date 6 months before a renewal. For the number of days between two known dates, use the Date Difference Calculator. To count only weekdays in a range, use the Working Days Calculator.

Frequently Asked Questions

Enter today's date, choose Add and type 90 in the Days box. The answer depends on the start date. From January 15, 2026 it is April 15, 2026. From September 25, 2026 it is December 24, 2026. The tool also shows the weekday and how many days away that date is.
No. Three calendar months can be anywhere from 89 to 92 days, depending on which months you cross. From January 15, 2026, 3 months is April 15, which is 90 days. From May 15, it is August 15, which is 92 days. Use Months for contract terms and Days for fixed day counts.
This tool gives February 28, or February 29 in a leap year. When the start day does not exist in the target month, it uses the last day of that month. Some software rolls over into March instead, so results can differ between programs. Check which rule your contract or system uses.
No. It counts every calendar day. If you need a date that is a set number of business days away, count the weekdays with the Working Days Calculator. Then adjust for any public holidays in your area. The result here does tell you when a date lands on a weekend.

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