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Date Difference Calculator

Calculate the exact difference between two dates, both in total days and broken down into years, months, and days. Perfect for calculating deadlines, project durations, elapsed time, or the time remaining until an event.

How it works

  1. Select the start date in the first field.
  2. Select the end date in the second field.
  3. The calculator automatically shows the difference in years, months, and days, plus the total number of days.
  4. If the end date is earlier than the start date, the absolute difference is calculated and a notice is shown.

Use cases

  • Calculating how many days are left until a wedding, trip, or important event.
  • Determining the exact duration of a project, contract, or work period.
  • Calculating an employee's length of service in years, months, and days.
  • Checking legal or administrative deadlines that depend on an exact number of days.

Frequently asked questions