Hi Everyone, I have been spending some time building a gearing ratio calculation tool. This tool allows you to upload your Lego Technic .ldr (Lego Draw) file and it will simulate the gearing system and visualize it as well as showing the gearing ratios relative to the input component. The tool only shows and supports Lego Technic parts related to gearing systems such as axles, gears, differentials, driving rings and worm gears etc. All other parts are now shown.
Here's a video about it. Hope you might find it useful for your next project.