This mod is not known to work with the latest version of Kerbal Space Program. Proceed with caution.
The Transfer Window Planner is a plugin to let you visualise planetary transfer efficiency in-game. Using it you can select your planet of Origin and planet of Destination and it will present you with details about the required Delta-V to travel from Origin to Destination.
You access the tool by clicking on the Porkchop icon in either the AppLauncher or Common Toolbar - your choice - then follow the instructions in the main window. Once you have selected a transfer you can use the Copy buttons to copy that text to any other plugin or window.
Raw stats are from the beginning of time until now. Each follower and download entry represents one hour of data. Uneventful hours are omitted.