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 FileMaker Pro Custom Functions

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Age ( DOB )

Rate this function:  

  Average rating: 3.8  (44 votes)
  Discuss this Custom Function

Chris Stasny, EducatorsInc

Converts date of birth to an age in years

Sample Input:
Age ( 6/29/1954 )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


This is a quick calculation that compares todays date to the DOB (Date Of Birth ) parameter. It returns the age in years.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


This calculation is a poor approximation to actual age around a person's birthday. There are much better calculations involving tests for whether the birthday has occurred in the current year.

David Head, Darwin Australia
October 06, 2009 1:09pm

I agree. It's not too difficult to calculate the exact age:

Let (
today = Get (CurrentDate)
Year ( today ) - Year ( DOB ) -
( today < Date ( Month ( DOB ) ; Day ( DOB ) ; Year ( today ) ) )

comment, VR
October 07, 2009 8:10pm

and a CF already exist with this calculation, see

Lee Smith, Woodland
October 12, 2009 6:34am

Another age calculator. Just what we need.

Matt, Vermont
November 12, 2009 6:55pm

Worked perfectly thank you!

Duncan Adamson, Glasgow
December 25, 2012 5:26am

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

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Answer 5 + 2 =
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