Do you want to compare the charging cost of electric vehicles based on your own kWh electricity rate?

Higher Fuel cost improves the case for EVs

Average fuel cost for combustion vehicles has increased 37% from around $0.08 at the start of 2016 to around $0.11 in 2017 while average electricity rates in the USA only increased around 5%. In some states such as Hawaii where EV ownership was not economical rates have decreased from highs due to solar generation.

The best way to compare EVs amongst each other and with combustion vehicles is to calculate fuel cost. Use wattEV2buy’s charging cost calculator to determine the charge cost in your state or country. We utilize “usable” battery capacity, real-life millage as determined by the EPA, and charge efficiencies for a more accurate comparison across vehicles and compare the result relative to owning a combustion vehicle.

The calculator uses the latest electricity rates per state to calculate your EV charge cost or enter your own rate to see the benefits of time of use charging.

NOTE: Although we ensure that we use the correct available battery capacities and not averages such as most other calculators to get the most accurate calculation real-life cost and ranges might vary due to weather conditions and other factors such as battery decay.

EV manufacturers and dealerships don’t provide the cost per mile/km for you to make an informed comparison in your EV buying decision. WattEV2Buy allows you to calculate your EV charging cost based on your electricity cost .

charging cost

The United States Environmental Protection Agency issues a Monroney Sticker, otherwise known as a Window Sticker showing the fuel economy through a metric called the MPGe (Mile Per Gallon equivalent) which is based on the energy content comparable across various fuel types and vehicle technologies. The sticker also shows other estimated fuel costs, but it does not provide the per kWh charging cost which is a function of the battery, range, and specific utility electricity rate.


We have improved our charge calculator and moved it to our sister site Please click on the logo below for the improved calculator.



To compare efficiencies of electric vehicles go to the list below.




We have designed some cool tools to compare electric vehicles. Our tools include a mobile app, charging cost calculator and EV selector. Use wattEV2Buy’s proprietary tools to find the ideal EV for your requirements and determine the cost of charging EVs.