How are business days calculated between two dates?

Our algorithm iterates through every calendar date in your range and excludes Saturdays and Sundays to output total working business days.

Does the days between dates calculator include leap years?

Yes, all leap days (February 29th) are automatically calculated using UTC calendar epoch mathematics.

Calculate Days Between Dates

Find total calendar days, business weekdays, weekends, weeks, and precise date durations.

Start Date:

End Date:

Include End Date (+1 Day)

Target Date Forecast

Add or Subtract Days from Date

Calculate the exact future or past date by adding or subtracting days, weeks, or months.

START DATE:

OPERATION:

NUMBER OF DAYS:

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Knowledge Base

Frequently Asked Questions

Everything you need to know about date duration math.

Business weekdays exclude all Saturdays and Sundays. The calculator iterates through each day in your date span to provide total working business days.

You can compute your exact age in years, months, days, hours, and seconds using our dedicated age tool at age.fasttools.top.

You can calculate 90-minute REM sleep schedules at sleep.fasttools.top.