Days Between Dates Calculator
About Days Between Dates Calculator
Our free Days Between Dates Calculator instantly works out the number of days, weeks, months, and years between any two dates, and also lets you add or subtract a number of days from a starting date to find a resulting date.
How to Use the Days Between Dates Calculator
- Select a start date and an end date to see the days, weeks, months, and years between them.
- Or switch to the add/subtract mode, enter a starting date, and specify how many days to add or subtract.
- Read the resulting date or duration instantly as it updates.
- Adjust either date at any time to recalculate without starting over.
Who uses this tool: Project managers use it to count working days toward a deadline, HR teams use it to calculate leave duration or notice periods, event planners use it to count down to a wedding or launch date, and people tracking a contract or warranty use the add/subtract mode to find the exact expiration date from a start date. Legal assistants use it to verify filing deadlines that are calculated as a set number of days from a triggering event, and travelers use it to check how many days remain on a visa or how long a trip will actually last from departure to return, without manually counting on a calendar or miscounting across a month boundary.
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Frequently asked questions
Does this include or exclude the start and end date?
The calculator counts full calendar days between the two dates you enter - useful for deadlines, countdowns, and duration tracking.
Can I calculate days between dates in different years?
Yes - enter any two dates, past or future, in any year, and the calculator handles the full span including leap years correctly.
Can I use this to count business days only?
This calculator counts total calendar days including weekends - for business-day-only counts you'd need to subtract weekends and holidays manually.
