A quick and easy way to do calculations on dates. Simply enter the start date and end date, then hit 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.

Only dates in the range 16/11/1858 to 29/8/2132 are permissible. This page requires a JavaScript enabled browser to function.