Date Calculator

A quick and easy way to do calculations on dates. Simply enter the start date and end date, then click the "Difference" button to find how many days, months and years between the dates. Alternatively enter a start date and the number of years, months, weeks and days you wish to add or subtract and hit the 'Add' button to find the target date.

Start Date (dd/mm/yyyy):
End Date (dd/mm/yyyy):


This page requires a JavaScript-enabled browser to function. Only dates in the range 16 November 1858 to 29 August 2132 are allowed. To view the source code, right click and select "view source" or type control-u.


Last updated 25 February 2018.

If you have questions or comments, please send a message to Dan Anderson.