Date difference calculator
Days Between Dates Calculator
Count the exact number of calendar days between two dates, plus inclusive days, weeks, months, and years for planning, deadlines, billing periods, and event tracking.
Elapsed Days
Elapsed days count the number of calendar days between two dates. January 1 to January 2 is 1 elapsed day.
Inclusive Days
Inclusive days count both the start date and end date. This is useful for travel, events, and schedules where both dates matter.
Calendar Days
This calculator includes weekends. For weekday-only deadlines, use the business days calculator instead.
How to Count Days Between Dates
- Enter the first date in the Start Date field.
- Enter the second date in the End Date field.
- Select Calculate Difference to see elapsed days, inclusive days, weeks, months, and years.
The order of the dates does not matter. If the end date is before the start date, the calculator still returns the absolute date difference.
Days Between Dates Examples
| Date range | Elapsed days | Inclusive days | Common use |
|---|---|---|---|
| January 1 to January 31 | 30 days | 31 days | Monthly reports, rental periods, and planning windows |
| June 1 to September 1 | 92 days | 93 days | Summer programs, quarterly plans, and project timelines |
| December 1 to December 25 | 24 days | 25 days | Holiday countdowns and event preparation |
Use a Different Date Calculator
Days Between Dates FAQ
How do you calculate days between two dates?
Choose a start date and end date. The calculator counts the elapsed calendar days between them, so January 1 to January 2 is 1 elapsed day.
What is the difference between elapsed days and inclusive days?
Elapsed days count the time between dates and do not count the start date as a full extra day. Inclusive days count both the start date and the end date.
Does this count business days?
This page counts calendar days. Use the business days calculator when weekends or holidays should be excluded.