Date Calculator (Add or Subtract Days)
Find a deadline, expiry date or notice period: what date is 30 days from today, 12 weeks after a start date or 6 months before an event. You can also skip weekends.
Free · No sign-up · Files stay on your device
How to use Date Calculator
- 1Pick a start date (today by default).
- 2Choose add or subtract and enter days, weeks, months or years.
- 3Read the resulting date and weekday.
Features
- Add or subtract days, weeks, months, years
- Business days (skip weekends)
- Weekday and week number
- Quick presets (30, 60, 90 days…)
- Correct end-of-month handling
Adding months correctly
Months have different lengths, so adding one month to 31 January gives 28 or 29 February (the last day of the month) rather than skipping into March. Business-day mode skips Saturdays and Sundays, which is how most payment and notice periods are counted.
Frequently asked questions
What date is 90 days from today?
Choose today, add 90 days and the answer appears instantly.
Are public holidays skipped?
Business-day mode skips weekends only, since holidays differ by country.
How do I count the days between two dates?
Use our Date Difference Calculator.
Related tools
Days Between DatesCount the days between two dates, including or excluding the end date. Also shows weeks, months and years, plus working days (Monday to Friday).Age CalculatorCalculate your exact age in years, months and days from your date of birth. See total days lived and the countdown to your next birthday. Free.Time CalculatorAdd or subtract hours, minutes and seconds, and calculate the duration between two times, including overnight shifts. Great for timesheets and work hours.