Add Days to Date
Add or subtract days, weeks, months, or years — see the resulting calendar date.
Shift Any Date Forward or Back
Need to know what date is 90 days from today, or 6 months before a deadline? Enter your start date, pick days/weeks/months/years, and the tool handles the calendar math — including leap years and month-end edge cases.
Common Scenarios
- Trial expiry (14, 30, 90 days from signup)
- Loan or subscription renewal dates
- Medication schedules ("every 21 days")
- Return or warranty windows
Frequently Asked Questions
How do I add 30 days to a date?
Pick your start date, enter 30 in the days field, choose "add," and the tool returns the exact future date — handling month-end rollover and leap years.
Can I subtract days from a date?
Yes. Toggle to "subtract" (or enter a negative number) to go backwards. Useful for lookback periods, preparing deadlines, or trial-period math.
Does this skip weekends?
No — this adds calendar days. For business-day math (skipping weekends) use our working days calculator instead.
Can I add months or years instead of days?
Yes. Switch the unit to months or years. The tool preserves the day-of-month when possible (Jan 31 + 1 month = Feb 28/29).