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Days Between Dates Calculator

Calculate the number of days between two dates.

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Days Between Dates Calculator
Calculate the number of days between two dates.

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Measure the Duration Between Two Dates

This simple tool quickly calculates the total number of full days between any two dates you choose. It's perfect for counting down to an event, tracking project timelines, figuring out age in days, or settling a debate about how long it's been since something happened.

The Calculation Explained

The calculator converts both the start date and the end date into a numerical format (typically the number of milliseconds since a standard epoch, like January 1, 1970). It then finds the difference and converts that result back into days.

How to Use the Calculator

  1. Start Date: Use the date picker to select the beginning date.
  2. End Date: Use the date picker to select the ending date.
  3. Calculate: The tool will instantly display the total number of days between the two dates.

Real-World Example

You want to know how many days are between February 15, 2024 and May 1, 2024.

  • The calculator will determine the number of remaining days in February (14), plus all of March (31), all of April (30), and the first day of May (1).
  • Alternatively, it calculates the difference in days directly, correctly accounting for the leap year. The result is 76 days.

Frequently Asked Questions (FAQ)

  • Is the calculation inclusive? The calculator counts the number of full 24-hour periods between the two dates. It typically does not include the end date itself. For example, the number of days between today and tomorrow is 1.
  • Does it account for leap years? Yes, the underlying date logic correctly handles leap years, so February 29th is included in years when it occurs.
  • Can I calculate working days? This tool calculates the total number of calendar days. To calculate only business days (Monday-Friday) and optionally exclude holidays, please use our Working Days Calculator.