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How to use the Date Duration Calculator

This page explains how to use the Date Duration Calculator that calculates the number of days, weeks, months and years between two dates

Input fields

Date entry

The order of the Day, Month and Year fields depend on your browser's language settings or the order specified in the Site configuration. If the day, month and year are left empty, the current UTC/GMT date is used as default.

Include end date in calculation

If "Include end date in calculation" is checked, one additional day would be added.

  • If you want to calculate the age of something, leave this unchecked (the last/end date is not counted as one additional day).
  • If you want to count how many days something lasted, e.g. an event that lasted from the 1st to and including the 4th day in the month, this should be checked (result: 4 days), otherwise the last day would not be counted (returning 3 days).


Here are two examples, with all fields filled in, just click the "Calculate duration" after following the links.

Topics: Help

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