Days Between Dates Calculator
Calculate the exact number of days, weeks, and months between any two dates.
The Days Between Dates Calculator counts the exact number of days between any two dates. It also provides the approximate equivalent in weeks, months, and years.
How It Works
Enter a start date and end date. The calculator computes the exact number of calendar days between them, properly handling different month lengths and leap years. The result is always a positive number regardless of date order.
Common Uses
- Project planning: How many days until a deadline?
- Event planning: Count days between events or milestones
- Age verification: Exact days between birth and another date
- Legal deadlines: Calculate filing periods and statute of limitations
- Travel planning: Duration of a trip in days
The week count divides total days by 7. Month and year approximations use average lengths (30.44 days/month, 365.25 days/year) since actual months vary from 28 to 31 days.
Frequently Asked Questions
Does it count the start date or end date?
It calculates the difference between the two dates. For inclusive counting (including both start and end), add 1 to the result.
How does it handle leap years?
The calculator accounts for leap years automatically. February 29 is included in the count when it falls between the two dates.
Why are months and years approximate?
Because months vary in length (28-31 days) and years can be 365 or 366 days. The calculator uses averages (30.44 days/month, 365.25 days/year) for these approximations.