Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Calculating Fractions of Years.

Calculating Fractions of Years

by Allen Wyatt
(last updated November 9, 2019)

2

One of the types of data that Excel allows you to store is, of course, dates. At some point you may wish to perform some calculations with the dates in your worksheet. It is not uncommon to need to figure out the percentage of a year represented by the difference between two dates. Excel allows you to calculate this easily using the YEARFRAC worksheet function.

To use the function, all you need to do is provide two dates and a value that specifies how Excel should calculate the fractional year:

=YEARFRAC(DateOne, DateTwo, Basis)

The dates used by YEARFRAC can be either static dates, or they can be references to cells that contain dates. The Basis value ranges between 0 and 4, with 0 being the default. The following are the different meanings for the Basis:

Basis Meaning
0 US 30/360
1 Actual/actual
2 Actual/360
3 Actual/365
4 European 30/360

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (9366) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. You can find a version of this tip for the older menu interface of Excel here: Calculating Fractions of Years.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company. ...

MORE FROM ALLEN

Copying Worksheet Code Automatically

When creating a workbook to be used by others, you may want any worksheets they add to the workbook to contain some ...

Discover More

Inserting Footnotes Using Custom Footnote Marks

Automatic footnotes are easy to insert in Word documents. The default settings are usually fine for most projects. ...

Discover More

Copying a Spreadsheet

There are times when you don't want to mess up a spreadsheet, but you want to try out some changes. This is when making a ...

Discover More

Excel Smarts for Beginners! Featuring the friendly and trusted For Dummies style, this popular guide shows beginners how to get up and running with Excel while also helping more experienced users get comfortable with the newest features. Check out Excel 2013 For Dummies today!

More ExcelTips (ribbon)

Unique Date Displays

Need to print an elapsed date in a strange format? It's easier to do than may appear at first glance. Here's a discussion ...

Discover More

Calculating Week-Ending Dates

When working with dates, you may need to figure out all the dates on which weeks end in a given year. There are several ...

Discover More

ISO Week Numbers in Excel

Work in an industry that uses ISO standards when it comes to working with dates? You'll love the formula in this tip ...

Discover More
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

View most recent newsletter.

Comments

If you would like to add an image to your comment (not an avatar, but an image to help in making the point of your comment), include the characters [{fig}] in your comment text. You’ll be prompted to upload your image when you submit the comment. Maximum image size is 6Mpixels. Images larger than 600px wide or 1000px tall will be reduced. Up to three images may be included in a comment. All images are subject to review. Commenting privileges may be curtailed if inappropriate images are posted.

What is 6 - 0?

2019-11-09 07:00:31

DONtheMON

Thank you Willy. Information is not always clarification, but that source is a good reference to have.


2019-11-09 06:30:22

Willy Vanhaelen

Expanation about the meaning of the 5 basis arguments can be found at:
https://en.wikipedia.org/wiki/Day_count_convention


This Site

Got a version of Excel that uses the ribbon interface (Excel 2007 or later)? This site is for you! If you use an earlier version of Excel, visit our ExcelTips site focusing on the menu interface.

Newest Tips
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

(Your e-mail address is not shared with anyone, ever.)

View the most recent newsletter.