Days Between Dates Calculator

Calculate the exact number of days, weeks, months, or years between any two dates.

Select Dates
Enter the start and end dates
Result
Duration between the selected dates

Select both dates to see the duration

Days Between Dates Calculator

Calculate the exact number of days between any two dates. This tool is useful for planning, project management, and tracking durations.

What This Tool Calculates

  • Total days between two dates
  • Weeks and days breakdown
  • Months and days approximation
  • Years, months, and days breakdown
  • Business days (excluding weekends)

Common Use Cases

Project Management

  • Calculate project duration
  • Track milestone timelines
  • Plan sprint lengths

Personal Planning

  • Count days until events (birthdays, vacations)
  • Calculate age in days
  • Track relationship anniversaries

Business Applications

  • Calculate contract durations
  • Determine billing periods
  • Plan delivery schedules

Date Formats

The tool accepts dates in your browser's locale format. Common formats include:

  • MM/DD/YYYY (US)
  • DD/MM/YYYY (UK/EU)
  • YYYY-MM-DD (ISO)

Tips

  • The calculation includes the start date but excludes the end date (standard convention)
  • Swap dates to always get a positive result
  • Business days exclude Saturdays and Sundays