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What does MPGe mean?

By blogsadmin | Posted in General Information, Honda Clarity Lineup, How To, Tips & Tricks on Friday, January 5th, 2018 at 6:44 pm

Miles per Gallon Gasoline Equivalent Explained 

If you drive or are looking at an alternative fuel vehicle or a plug-in hybrid, you may have seen the term miles per gallon gasoline equivalent (MPGe) used.  But what does MPGe mean?  How is it measured?  Is it the same as MPG? 

Miles per gallon gasoline equivalent is the measure of the average distance traveled per unit of energy consumed, but in a way that is familiar to most Americans.  In simpler terms, it is like MPG for vehicles that use electricity, hydrogen, a mix of fuel types or any other type of vehicle that doesn’t use gasoline to operate.  This measurement is really just for comparing the energy use of an alternative vehicle with the fuel economy of a conventional internal combustion vehicles; it is not meant to compared costs. 

[You may be interested in: What is a Plug-in Hybrid?]

How to Calculate MPGe 

To determine the MPGe of a vehicle, you must convert the vehicle’s consumption per unit distance.  The EPA and car manufacturers measure the efficiency of an alternative fuel vehicle with kilowatt-hours per 100 miles (kWh/100m).  For instance, according to the US Department of Energy, the 2018 Honda Clarity Plug-in Hybrid has an electric fuel economy of 31 kWh/100m.  The general formula to calculate MPGe is: 

the total miles driven multiplied by the energy of 1 gallon of gasoline then that total is divided by the amount of energy that was consumed to equal MPG-equivalent

The EPA determines that 33.7 kilowatt per hour (kWh) of electricity is equivalent to 1-gallon of gasoline.  Here is an example: say you drive your electric vehicle 100-miles and consumed 24-kWh of electric energy, your MPGe would be about 140. 

100 miles multiplied with 33.7 kilowatt per hour and then that number is divided by 24 kilowatt per hour to equal 140 mpg-evuivalent

a man charging his 2018 Honda Clarity Plug-in HybridThis example is not based on any specific electric vehicle. 

2018 Honda Clarity Plug-in Hybrid MPGe* 

The new 2018 Honda Clarity Plug-in Hybrid has a 110 combined MPGe electric rating and a 42 combined MPG gasoline only rating.  As a plug-in hybrid, the efficient Honda Clarity is able to use both electric power and gasoline to operate, so it has a rating for both types of fuel.  It also features a 340-mile combined gas-electric driving range rating.  Its efficient hybrid powertrain, powerful electric motor and gas-powered engine add to the joy of driving an environmentally-friendly vehicle. 

If you have any questions regarding MPGe or how to calculate it, feel free to contact our knowledgeable staff at Indy Honda.  If you would like more information on the 2018 Honda Clarity Plug-in Hybrid, you can stop in or visit our online inventory. 

Read more of the Indy Honda Official Blog

*110 combined miles per gallon of gasoline-equivalent (MPGe) electric rating; 44 city/40 highway/42 combined MPG gasoline only rating. 47-mile maximum EV mode driving range rating, 340-mile combined gas-electric driving range rating. Ratings determined by EPA. Use for comparison purposes only. Your MPGe/MPG and driving range will vary depending on driving conditions, how you drive and maintain your vehicle, battery-pack age/condition and other factors. 


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