Add · Subtract
Date calculator
Jump forward or backward by days, weeks, or months — ideal for deadlines, invoices, and travel buffers.
Need working days instead? Use the business days calculator. For a live countdown to the result date, open Countdown.
Add or subtract
Result date
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Date calculator FAQ
How do I add days to a date?
Pick a start date, choose Add, enter the number of days (or weeks/months), then calculate.
Can I subtract months?
Yes. Switch to Subtract and choose Months as the unit.