Date Calculator
Calculate the number of days between two dates, or add and subtract days from any date. Find business days, weeks, months, and years between dates.
Days Between Dates
Frequently Asked Questions
How do I calculate the number of days between two dates?▾
Enter a start date and an end date. The calculator instantly shows the total calendar days, business days, weekend days, weeks, months, and years between them.
How do I add or subtract days from a date?▾
Switch to "Add/Subtract Days" mode, enter a start date and the number of days to add (positive) or subtract (negative). Toggle business days to skip weekends automatically.
What are business days?▾
Business days are weekdays from Monday through Friday, excluding Saturday and Sunday. This calculator counts only business days when the option is enabled, which is useful for project deadlines and delivery estimates.
Does the date calculator account for leap years?▾
Yes. The calculator correctly handles leap years, including February 29. A leap year has 366 days instead of 365, occurring every 4 years except for century years not divisible by 400.
Is this date calculator free to use?▾
Yes. This date calculator runs entirely in your browser with no signup required. No data is ever sent to a server.