Date Addition Calculator
Add days, weeks, months, or years to any date with quick presets.
Quick presets
Add 90 days
2026-05-22
Useful for deadlines, schedules, billing cycles, and planning. Month/year math follows the native calendar rules.
Examples
Add 7 days for next-week tasks, 30 days for monthly renewals, and 90 days for quarterly planning windows.
Frequently asked questions
How do I add days to a date?
Pick a start date, enter days, and choose the days unit to get the future date.
How do I add months without changing day?
Select months as the unit. Calendar month length rules are applied automatically.
Can I add weeks or years too?
Yes. The calculator supports days, weeks, months, and years.
Does this handle leap years?
Yes. Date math follows native leap-year rules.