The U.S. Department of Energy released an online tool to measure an electric vehicle’s “eGallon“ to help electric vehicle drivers figure out how their EV measures up similar vehicles fueled with gasoline. The term “eGallon” simply stands for the cost of fueling a vehicle with electricity compared to a similar vehicle powered by gasoline. Drivers who fuel up on gasoline can calculate how much money they’re spending driving around based on the rising and falling gas prices posted at every gas station. Folks who fuel up on electricity can now calculate the cost of electricity by determining their vehicle’s eGallon.
eGallon Methodology (PDF) is rather simple. The eGallon tool provided by the DOE calculates the average distance that a gasoline-powered vehicle can drive on one gallon of gas, then calculate how much it would cost to drive an average electric vehicle that same distance. The online tool shows how much an eGallon costs in each state, since electricity prices differ across the U.S., and compares that number to the cost of gasoline.
Electric vehicle technology continues to improve, and the cost of an electric vehicle and its battery is continuing to decline. Americans are switching to an EV more than they have in the past, which makes the eGallon a handy concept to use. With this methodology, the DOE has found that driving gasoline-powered vehicles costs approximately three times more than fueling a car with electricity.
Source: The eGallon: How Much Cheaper Is It to Drive on Electricity? Energy.gov