Days Between Dates Calculator
Loading calculator…
This days between dates calculator tells you how many days are between two calendar dates. It’s useful for project planning, deadlines, travel planning, pregnancy and medical timelines, school terms, and any situation where you need a clear date range.
Choose a start date and an end date and the calculator will show the total number of days between them instantly. If you support options like “include start date/end date” or “count weekdays only,” make those toggles clear on the page so people can match the result to their use case.
A common point of confusion is whether a date range is inclusive or exclusive. For example, counting from January 1 to January 2 can be interpreted as 1 day apart (exclusive) or 2 days in the range (inclusive). The UI and explanation text should state which method is being used.
For related tools, see the date add/subtract calculator and the time duration calculator.
How the count works
- Exclusive (common default): end − start
- Inclusive (optional): include start/end as configured
- Weekdays-only mode (optional): exclude weekends
Examples
- Jan 1 → Jan 2: 1 day apart (exclusive)
- Jan 1 → Jan 1: 0 days apart (exclusive)
FAQ
How do you calculate days between two dates?
Subtract the start date from the end date and count the days (the calculator does this automatically).
Does the result include the start or end date?
It depends on the setting; many calculators default to excluding the start date.
Does it account for leap years?
Yes—proper date calculations handle leap years and month lengths.
Can I count weekdays only?
If enabled, the calculator can exclude weekends and return business days.