Date Difference Calculator
Find the exact number of days between two dates, or the full calendar breakdown in years, months, and days.
Result
1,011 days
144 wk 3 d
weeks + days
2y 9m 7d
calendar difference
Quick Facts
- •1 year = 365 days (366 in leap years)
- •1 week = 7 days exactly
- •Use 'include end date' for inclusive counting (e.g., event duration)
- •Calendar difference accounts for varying month lengths
Formula
The absolute number of days between two dates. Toggle "include end date" to add 1 for inclusive counting.
Related Tools
Frequently Asked Questions
How many days between two dates?
Enter a start and end date above to see the exact number of days between dates, plus the calendar breakdown in years, months, and days.
Does this include the end date?
By default, no — it counts the days between the two dates. Toggle 'Include end date' to add one day.
How is the calendar difference calculated?
It calculates years, months, and remaining days using actual calendar months (not fixed 30-day months).
Does it handle leap years?
Yes. February 29 is handled correctly in leap years.
Can I calculate dates in the past?
Yes. Enter any two dates — past, present, or future.
What is the difference between total days and calendar difference?
Total days is the absolute count of days between dates. Calendar difference shows years/months/days, accounting for varying month lengths.