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 FileMaker Pro Custom Functions

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mkFormatDollarsWithCommas ( Amount )

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  Average rating: 4.5  (33 votes)
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Michael Kupietz, Michael Kupietz Consulting

Format a number as dollars, separated by commas and truncated to two decimal places. Uses recursion to avoid maximum limit on length of numbers to be formatted.

Sample Input:
mkFormatDollarsWithCommas ( 1234567898765432.1 )

mkFormatDollarsWithCommas ( -123 )
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 takes any string of digits, with any number of decimal places and an optional negative sign at the beginning, and returns them as a text string formatted dollar sign, commas every three decimal places before the decimal point, and two decimal places after the point.

The advantage of the recursive method used is that there is no maximum limit on the length of the number which is to be converted.

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


There appears to be an error in the formula in the line: 'If(Digits<0;"-";"")&"$"& 9;

If you replace 'Digits' with 'Number' (the correct parameter), it works.

Tim Owen

Tim Owen, Los Angeles, CA
December 03, 2009 4:07pm

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

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Answer 9 + 7 =
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