Date Time
Date Calculator
Add or subtract days from a starting date.
Free to use — no sign-up or login.
Result
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This free Date Calculator covers Add or subtract days from a starting date.
Shift a calendar date by a whole number of days (positive or negative). Related date time tools sit beside How it works, with no account required.
Using the Date Calculator
Add or subtract days from a starting date. Fill the labeled fields on the Date Calculator and read the result. The formula stays in How it works rather than being repeated here.
FAQ
How do I use the Date Calculator?
Enter the labeled values on the Date Calculator and read the output. Add the day offset to the start date.
What formula does the Date Calculator use?
The Date Calculator uses the identity in How it works. In words: Add the day offset to the start date.