Brian Dunning's FileMaker Custom Functions


Extracts numerator from a string representing a fraction.

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Brett Buchmiller   Brett Buchmiller

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  Sample input:
FractionNumerator( "3/8" )

FractionsNumerator( "5/16" )

FractionNumerator( "3 7/8" )
  Sample output:



  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Extracts the numerator from a string representing a fraction. Will work with improper fractions as well as mixed numbers. Result is numeric.



John Sauer   John Sauer, Boston, MA
Mar 7, 2018
This function fails on negative inputs.
FractionNumerator("-5 1/2") returns -9, but the correct value to return is -11.

The last line, "GetAsNumber(Middle..." should be added to the value preceding it if WholeNumber is positive, but subtracted from it if WholeNumber is negative.

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

Under construction. Email me your wish list for improvements.