Day Counter

Calculate the precise number of days between any two dates. Whether you need calendar days for a holiday or business days for a project, this tool has you covered.

Basic Formula: Duration = (End Date - Start Date) ÷ 86,400,000 milliseconds Working Days = Σ (Date i) where Day i is not Saturday or Sunday
From Jan 1 to Jan 31: Total: 30 days (excluding end date) or 31 days (including end date). Typically results in ~22-23 working days.

How many days are between two dates?

This depends on whether you include the end date. Standard calculations subtract the start date from the end date. For business purposes, people often "include" both days, adding 1 to the total count.

What are "working days"?

Working days are typically Monday through Friday. This counter automatically excludes Saturdays and Sundays to help you calculate project durations or school days.

Does this calculator account for leap years?

Yes, the day counter uses real calendar dates and automatically accounts for leap years, ensuring your results are 100% accurate over long time periods.

How do I count only business days?

Select the "Exclude Weekends" option in the calculator to get a count of business days. You can also manually subtract any specific holidays that fall during your date range.

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