Date Calculator
Add or subtract days from a date, or find the number of days between two dates.
How it works
Enter days to add or subtract from the start date, or an end date to count the days between. Both can be used at once.
Formula
Result date = start date + days; Days between = end date − start date
Example
January 1, 2025 plus 45 days is Saturday, February 15, 2025.
FAQ
Does it count the start date?
No. It counts elapsed days, so Jan 1 to Jan 2 is 1 day.
Can I subtract days?
Yes. Enter a negative number.
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Related guides
Guides are coming soon. Visit the guides page.