Day Counter

Use this counter to find the exact number of days between two dates. It automatically breaks down the duration into weeks and days, and calculates the number of working days (business days) and weekends.

Date Inputs

Start Date

End Date

Include end day (add 1 day)

Calculation Results

Total Duration

0Days

Weeks & Days0W 0D

Business Days0

Weekend Days0

Calendar Days vs. Business Days

When counting days, it is important to distinguish between Calendar Days and Business Days (also known as working days). This distinction is heavily used in legal contracts, shipping estimations, and project management.

Calendar Days

Calendar days refer to every day on the calendar, including weekends (Saturday and Sunday) and national holidays. If a contract states that you have "30 days" to respond, it almost universally means 30 calendar days.

Our Calculator: The large red number at the top of the calculator shows the total Calendar Days.

Business Days

Business days typically refer to Monday through Friday. They exclude weekends and public holidays. When an online store claims "shipping takes 3-5 business days," an order placed on Friday might not arrive until the following Thursday or Friday.

Note: Our calculator computes business days by strictly excluding Saturdays and Sundays. It does not factor in local holidays, as they vary drastically by country and region.

The Impact of Leap Years

A standard year on the Gregorian calendar has 365 days. However, because it takes the Earth approximately 365.2422 days to orbit the Sun, a "Leap Year" containing 366 days is introduced every four years to keep our calendar in alignment with the Earth's revolutions.

During a leap year, an extra day is added to the end of February (February 29). This calculator fully accounts for leap years. For example, if you calculate the days between January 1, 2024 and December 31, 2024, it will correctly output 365 days (or 366 if you select "Include end day"), whereas doing the same for 2023 would output 364 (or 365).