Date Duration Calculator

Instantly calculate how much time is in between any two dates.


Welcome to Preceden, an easy-to-use timeline maker that helps you create professional timelines in minutes

Sign Up Today to Create a Timeline of Your Life


What date/time formats do you support?

We support a wide variety of date/time formats. Here are a few examples:

Jan 2012
Jan 4, 2012
Jan 4, 2012 4pm
Jan 4, 2012 4:20pm
Jan 4, 2012 4:20:45pm
Jan 4, 2012 16:20:45

January 4, 2012

4/1/2012 4pm

4-1-2012 4pm

4 Jan 2012
4 Jan 12

24 AD
24 CE
24 BC


A few notes:

The calculator will show you the exact date/time it used in the results so you can double-check it to make sure it used the date you wanted.

How do I use the present date/time?

Enter Present when you want the calculator to use the current date.

For example, if you want to know how long it is until 2050, you could enter Present as the start date and 2050 as the end date.

If you want to know how long it’s been since VE Day, for example, enter May 8, 1945 as the start date and Present as the end date.

How can I figure out how old I am?

Enter your birthday as the start date and Present as the end date.

Why do you show two different durations for some searches?

If you use an end date without a time, the Date to Date Calculator will show one duration that includes that end date and one that doesn’t.

For example, let’s say you enter Jan 1, 2012 as the start date and Jan 3, 2012 as the end date. The calculator will show “Duration not including end date: 2 days” and “Duration including end date: 3 days”. Why?

When some people search for this, they’ll mean Jan 1 to the start of Jan 3 and other people will mean Jan 1 to the end of Jan 3. Since we can’t know your intentions when you enter a date like this, we’ll show you one result that includes Jan 3 and another that doesn’t. You can use whichever result applies to your situation.

What is this site?

The Date to Date Calculator is part of Preceden, an online timeline maker that lets you create simple, multilayered timelines. If you like the Date to Date Calculator, you’ll love Preceden. Get started on the Preceden homepage.