Edmunds: How to calculate an electric vehicle's charge costs

One of the challenges people have with electric vehicles is figuring out how much they cost to operate

One of the challenges people have with electric vehicles is figuring out how much they cost to operate. The price of fully charging an electric vehicle’s battery can vary wildly depending on when and where you charge it. For the bigger picture, you should also include the amortized cost of buying and installing a home charging station and the rates your utility company charges. Here’s how to calculate what it will cost to charge your EV, as compiled by Edmunds’ experts. IN: KILOWATT-HOURS PER 100 MILES, OUT: MPG When you’re shopping for a gasoline-powered car, you pay attention to how many miles per gallon it gets. For plug-in vehicles, the window sticker and the government’s fueleconomy.gov website will have a big EPA-estimated mpg equivalent figure. But this isn’t a useful metric for determining cost. A battery stores energy in kilowatt-hours, much like a gas tank stores fuel in gallons.