There do exist dedicated CAD converters (or CADverters) capable of converting many different CAD formats between each other. PRT is a generic extension for numerous CAD design formats (parts), but it is very likely that most of them can be easily converted to IGES format (.igs, .iges).
Convert CAD 3D part or component to IGES 3D exchange format.
We found 8 software records in the database related to .prt to .igs file format conversion.
Microsoft Windows software - convert prt to igs on Windows
A 2D and 3D CAD construction software
Convert from prt file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned prt to igs. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A CAD converter with huge format support
A widely-used 3D animation application from Autodesk
A 3D CAD translation softwate
A feature rich 3D CAD software by Siemens
A dedicated CAD converter
A CAD visualizaton, analyzation and translating system
A CAD viewer program with conversion capabilities