How to add or subtract days from a date
Choose a start date, pick add or subtract, enter a number and choose a unit. For example, 90 days from 1 January 2026 is 1 April 2026.
If adding months or years lands on a day that doesn't exist, such as 31 April, the result moves to the last day of that month.
Calendar days versus business days
This calculator adds calendar days, so weekends are included. To see how many weekdays fall in a range, use the days between dates calculator.
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Frequently asked questions
What date is 30 days from today?
Leave the start date as today, choose Add, and enter 30 days. The result shows the full date and weekday.
Can I go back in time?
Yes. Choose Subtract to find a date before the start date.
Does it count weekends?
Yes. Days are calendar days, including Saturdays and Sundays.
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