Add or subtract days
Add or subtract days from a date and see the resulting weekday.
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How it works
Starts from a date and adds or subtracts a number of days to give you the resulting date and the weekday it falls on. Handy for deadlines, due dates, warranties, or planning deliveries.
Formula
end date = start date ± n days
Example
31 January 2026 + 30 days = 2 March 2026. February has 28 days that year, which is why the result does not land on 28 February.
Frequently asked questions
Can I subtract days?
Yes. Enter a negative number or pick the subtract option to get an earlier date.
Do weekends count?
By default calendar days are added, weekends included. To skip Saturdays and Sundays use the weekdays option.