Add days to date
Add days, weeks, months or years to a date
Enter a start date and a number of days, weeks, months or years to calculate the future date. See the weekday and a breakdown in weeks and business days.
Date calculator
Result
Tuesday, July 14, 2026
Added 30 days to Sunday, June 14, 2026
4 weeks, 2 days (30 total days)
Frequently asked questions
- How do I add 90 days to a date?
- Enter your start date, type 90, select "days" as the unit, choose "add", and the calculator shows the date 90 days later.
- Can I add business days only?
- Yes. When adding days, check "Show business days" to see how many weekdays fall in that range. The result still shows the calendar date, not a business-days-only date.
- What happens when adding months across month boundaries?
- Adding months works by incrementing the month number. If the target month has fewer days, the result lands on the last day of that month (e.g. Jan 31 + 1 month = Feb 28 or 29).
- Does this handle leap years?
- Yes. The calculator uses real calendar math, so February 29 is included when crossing a leap year boundary.