How much is 20 grams of lead? Solution: 20 grams of lead is 20 grams, and if kilograms are used as units, it is 0.02kg. Electric energy has also made outstanding contributions to transportation. Electric energy can be transformed into the ability of traffic management and command. For example, the speedometer installed on the highway can measure the speed of vehicles driving on the highway, so that the vehicles can travel at the specified speed. The smooth flow of roads is realized by electricity.