For the similarly named ship, please see galleon. A gallon was an Earth unit of volume. In 2268, Montgomery Scott ordered one-half gallon of Scotch. (TOS: "Spectre of the Gun") This amount is slightly less than two liters. External link Edit Gallon at Wikipedia Retrieved from "https://memory-alpha.fandom.com/wiki/Gallon?oldid=2282301" Categories: Measurements Add category Cancel Save Community content is available under CC-BY-NC unless otherwise noted.