Add or Subtract Days
Add or subtract days, weeks, months or years from a date — with an option to count business days only.
About Add or Subtract Days
This date calculator adds or subtracts days, weeks, months or years from any date. Pick the start date, choose Add or Subtract, enter the amounts and read the resulting date with its day of the week.
Tick Business days to count only Monday to Friday and skip weekends, which is useful for delivery estimates, notice periods and payment due dates. It quickly answers questions such as what the date will be 90 days from today or 45 days before a deadline. The calculator is free, needs no sign-up and runs in your browser.
How to use Add or Subtract Days
- Pick the start date.
- Choose Add or Subtract.
- Enter years, months, weeks and days.
- Tick “Business days” to skip Saturdays and Sundays when counting days.
Frequently asked questions
What happens when adding a month to 31 January?
The date is clamped to the last day of the target month — 31 Jan + 1 month = 28 Feb (29 Feb in a leap year).
How do business days work?
Years, months and weeks are applied as calendar periods first, then the “days” value is counted in weekdays only (Monday to Friday).
What is the date 90 days from today?
Leave the start date as today, choose Add and enter 90 days; the resulting date and weekday are shown instantly.
How do I subtract days from a date?
Choose Subtract, enter the number of days, weeks, months or years, and read the earlier date.
How do I add business days to a date?
Tick Business days and enter the number of days; Saturdays and Sundays are skipped in the count.
People also search for
add or subtract days · add or subtract days from date · add or subtract days calculator · subtract days from date online · add or subtract business days · add days to date · add days online · subtract days from date · subtract days online · find date from days · date after 90 days from today · add days online calculator