How to convert and export Google SketchUp SKP files to STL for 3D printing
If you want to actually 3D print something you made in Google Sketchup, you need to convert the SKP file to STL. Have no fear, it's actually really easy if you follow these steps!
Download the free Sketchup-STL extension (the RBZ file) from https://github.com/SketchUp/sketchup-stl
The latest version can be downloaded at https://github.com/SketchUp/sketchup-stl/raw/master/sketchup-stl-1.0.0.rbz
Then open up SketchUp, select Window > Preferences > Extensions > Install Extension and select the RBZ file you downloaded
Mac OS X:
Open up Sketchup, select Sketchup > Preferences > Extensions > Install Extension and select the RBZ file you downloaded
Now you can convert your SKP files to STL by doing File > Export. You can even import STL files into SketchUp using File > Import!
By Brian Roizen