Date Calculator
Calculate the number of days between two dates, or add/subtract days from a date.
Days Between
—
Enter both dates
How Date Calculation Works
Days between dates are calculated by counting every calendar day, including weekends and holidays, accounting for leap years (366 days) and varying month lengths (28–31 days).
Frequently Asked Questions
How do I calculate days between two dates?
Enter a start and end date. The calculator counts every day between them, accounting for leap years and varying month lengths.
Does this include or exclude the end date?
The default count excludes the end date (like counting days remaining). Toggle 'include end date' to add one day if needed.
Can I add or subtract days from a date?
Yes. Use the 'Add/subtract' mode to find a date a certain number of days, weeks, or months from any starting date.