fh to eps conversion is often searched as 'freehand to postscript' conversion, typically by users that own any of the old FreeHand images and are looking for a way to export these to something else, for example Encapsulated PostScript.
Freehand was discontinued years ago, yet some tools still support its original formats so this presents the option for export. But far best option is to download specific version of FreeHand from abandonware websites and simply export the files to format you need. But for some old versions you might need to run a virtual machine with old Windows.