Buying an electric car can be quite confusing, especially when you have to calculate how much it will cost to drive it around town.

There are many reasons for this. First, electric vehicles are new and even the people selling them at the dealership don’t know much about them. Furthermore, instead of automaker ads explaining the basics of electric vehicles with familiar voice actors, they’re still selling trucks with awesome multi-function tailgates.

The Monroney sticker (the piece of paper that comes on all new vehicles and lists all the features, price, environmental impact, and efficiency) does give you an annual cost to run the vehicle, but it’s wrapped in MPGe (miles per gallon equivalent), a weird calculation that you’ll never make in real life. But there’s a better way to figure it out, and the EPA and automakers should be using it instead. The miles per kilowatt-hour measurement.

On gasoline cars, the Monroney sticker gives you a pretty basic mileage per gallon rating. You know how much gas costs and can figure out how much it will affect your bank account.