Date Difference Calculator
Find the exact number of days, weeks, months, and years between any two dates.
How to Use the Date Difference Calculator
Select a start date and end date using the calendar pickers or type them in YYYY-MM-DD format. Click Calculate Difference to see the result in multiple units. Toggle "Exclude weekends" to get business days only — useful for project planning or legal deadlines.
Common Uses
- Project deadlines — How many working days until launch?
- Age calculations — How many days since a specific event?
- Anniversary countdowns — Days until a special date
- Contract timelines — Days between contract start and end
- Travel planning — Days between booking and departure
Frequently Asked Questions
Does the tool count both the start and end date? No — it counts the calendar days between the two dates. Add 1 to include the end date itself.
How accurate is the month count? Month counts are approximate since months have different lengths. The tool counts complete calendar months plus remaining days.