Date Calculator

Overview

Use this date difference calculator to count days between deadlines, events, plans, or study schedules.

Enter a start date and end date to see the day difference, inclusive day count, approximate weeks, and calendar month difference.

Date Difference Rules

• Difference in days counts the elapsed days from the start date to the end date.
• Inclusive days adds one day so both the start and end dates are counted.
• Approximate weeks divide elapsed days by seven.

Practical Tips

• Use inclusive days when both boundary dates should count.
• Use elapsed days for deadlines and durations.
• The calculator accepts either date order and tells you which date comes later.