Date Add / Subtract Calculator
Add or subtract days, weeks, months, or years from a date.
Shift a date by any amount
Working out a date a certain span before or after another is a constant need — renewal dates, warranties, notice periods. This tool adds or subtracts days, weeks, months, or years from a starting date.
Thirty days after a date is a simple shift; adding months or years moves the calendar fields directly, so the result matches how scheduling software behaves. Switch the direction to count backward instead.
Reliable and private
It performs the date arithmetic in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What units can I use?
Days, weeks, months, and years. Months and years shift the calendar fields, so month-ends are handled the way calendars normally do.
How is subtracting done?
Choose subtract as the direction, or the tool moves the date earlier by the amount you enter.
Does it handle month overflow?
Adding a month to January 31 rolls into early March, matching standard date arithmetic in most software.
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