Date Difference Calculator

Date Difference Calculator
Today (UTC) is:
Monday September 26, 2016 (9/26/2016)

Date Format:

Start Date:
End Date:
Business Days
Days Difference:

Calculator Use

Calculate date difference in days or business days between 2 dates. Enter the dates. Check "Business Days Only" to calculate only business days (Monday through Friday).  Check "Saturday is a Business Day" if you consider it so.

Related Calculator: Date ± Days

Counts actual days based on the dates you submit; a year is 365 days and a leap year is 366 days.  Counts the difference between 2 dates, for example, 2/5/2013 minus 2/1/2013 = 4 days.  In other words, properly stated, on 2/1/2013 it is 4 days until 2/5/2013, and on 2/5/2013, 2/1/2013 was 4 days ago.

Date Formats:

Formats for USA and Europe should use slashes or dots. mm/dd/yy or dd/mm/yy or mm.dd.yy or ISO is for international date format in the form yyyy-mm-dd from ISO 8601. Today's date is Greenwich Mean Time (GMT).


Cookies are used to remember your last settings for Format, Days and Business Days choices.


This calculator does not factor out holidays.  If you are counting holidays as non-business days you must extend your final date to include the number of holidays you span.  For example, if your range spans across weekdays for July 4th and Labor Day you would extend 2 days.

Federal Holidays from the U.S. Office of Personnel Management

Financial Market Holidays from NYSE Euronext

Use this calculator as a days difference calculator.  Calculate days for contracts, business agreements, birth days, age, etc.


Cite this content, page or calculator as:

Furey, Edward "Date Difference Calculator" From - Online Calculator Resource.