Date Add/Subtract Calculator
Add/Subtract Days
Add or subtract a number of days from a date
Add/Subtract Months
Add or subtract months from a date
Add/Subtract Years
Add or subtract years from a date
Formula
Result Date = Start Date ± Days/Months/Years
Frequently Asked Questions
How do I calculate a date 90 days from now?
Enter today's date, select 'Add', and enter 90 in the days field. The calculator will find the exact date 90 days in the future, accounting for varying month lengths.
What happens when adding months crosses a month boundary?
The calculator uses JavaScript's built-in date handling. If you add 1 month to January 31, it rolls forward to March 3 (or March 2 in a leap year), since February doesn't have 31 days.
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