Planttools includes plugins for the Autodesk AutoCAD Plant3D

    IFC Exporter for AutoCAD Plant3D
    About IFC Exporter for AutoCAD Plant3D

    With IFC Exporter you can export any Plant3D file (or part of the large file) to the IFC2x3 or IFC4 format

    Easiest way to export Plant3D model is to select Schema version and Export all Objects option. You can also select optionally wheather or not export properties as well with the Export Properties check box. After that just press Export to IFC button and the plugin will ask for the IFC filename and creates it.