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Date Calculator

Calculate date differences, add/subtract days, and count business days.

Date Difference

Add / Subtract Days

Business Days

What is this tool?

A tool for various date calculations. It can calculate the difference between two dates (years/months/days/total days), add or subtract days from a base date, and count business days excluding weekends. All calculations run entirely in the browser.

How to Use

  1. To calculate the difference between dates, enter a start and end date, then click 'Calculate'.
  2. To add or subtract days, enter a base date and the number of days (negative to subtract), then click 'Calculate'.
  3. To count business days, enter a start and end date, then click 'Calculate'. Weekends are excluded.
  4. Click 'Today' to fill in today's date.

Examples

  • Calculate the duration between a project's start and end dates.
  • Find the date 30 business days from a deadline.
  • Calculate the remaining days of a contract period.
  • Count down the days until an event.