Add Days to a Date Calculator
Enter a start date and a number of days to find the new date, forward or backward.
Quick answer: Add days to a date by counting forward day by day. 30 days after January 1 is January 31, and 90 days after January 1 is April 1 in a year that is not a leap year.
How to use it
- Choose the start date. It is today by default.
- Type the number of days.
- Pick add or subtract. The new date and its weekday appear in large letters.
Common questions answered
- 30 days after January 1 is January 31.
- 60 days after January 1 is March 2 in a normal year (March 1 in a leap year).
- 90 days after January 1 is April 1 in a normal year.
- 7 days is one week, and 14 days is two weeks.
Month lengths differ, so counting by days is more exact than saying 'a month'. Use the days between dates calculator to count the other way.
What people use it for
- Deadlines, due dates and notice periods
- Return windows and warranties
- Planning courses, trials and subscriptions
- Counting 30, 60 or 90 days from a date
- Looking back a number of days
Questions
What date is 30 days from today?
Choose today as the start date and enter 30 days. The result is shown with its weekday.
Can I subtract days?
Yes. Choose Subtract days to go backward.
Does it include weekends?
Yes. It counts every calendar day, weekends and holidays included.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.