From DOE: "How much does it cost to commute to work or drive across town? The price of gasoline is posted at every corner gas station, but what about the cost of driving on electricity? The Department of Energy’s eGallon provides a quick and simple answer to this question and allows electric vehicle (EV) drivers to see how much they can save on fuel by using electricity instead of gasoline."
Some background words found over at The Freep:
And the eGallon calculator is here:
Of course, "we" knew this 'stuff' already...