How To Calculate Electric Car Efficiency

Electric cars are an excellent option for those looking to save on gas and reduce their carbon footprint. However, if you’re considering making the switch, it’s essential to know how to calculate electric car efficiency.

One way to calculate your car’s efficiency is by multiplying its total distance traveled by the number of kWh used divided by 100 miles (e.g., if a vehicle goes 100 miles on 15 kWh, that would be 600 mpg).

Read on to discover some other ways to calculate your electric vehicle’s efficiency. We will also discuss some of the factors that affect efficiency in electric vehicles and the advantages and disadvantages of these vehicles.

Calculating Electric Vehicle Efficiency

Calculating electric vehicle efficiency allows you to see how much electricity is being used and what it costs you. A quick way to do this calculation is by dividing your electric bill from a month into kilowatt hours (kWh) and then multiplying that number by the cost per kWh. For example, $150 divided by 300=0.50 multiplied by 20 cents per kWh =$0.25/hr.

A more accurate but time-consuming method would be calculating every charge separately, which could add up if someone charges their vehicle multiple times for one day or week at different power rates.

How Does Electric Car Efficiency Work?

It is a measurement of how much energy the electric motor uses to move the vehicle. The higher the electric car efficiency, the further it will go on one full charge and use less battery power in proportion to its total weight.

Electric cars are environmentally friendly because they don’t produce any emissions of greenhouse gasses while running. However, electric motors use electricity from your utility company that may be generated by fossil fuels such as:

  • Coal
  • Natural Gas
  • Oil

All of these fossil fuels can create pollution when used in other ways besides powering an electric car.

The United States Department of Energy calculates miles per gallon equivalent (MPGe) for electric cars. This is the number that most people use to compare electric car efficiency with vehicles fueled by gasoline or diesel fuel. The EPA uses MPG, which measures actual gas consumption in the distance traveled and does not consider driving patterns such as idling or frequent starting and stopping.

EVs Takes Half the Energy to Travel than Gas-Powered Vehicles

A typical EV consumes electricity to travel 100 miles on a single charge; thus, its MPGe rating would be about 120-130 Mpge. An average gasoline vehicle achieves an MPG of around 20 mpg, so if it travels 100 miles on one tank of gas, then its MPGe would be only 12-13 mpge because it took twice as much energy from gas to travel the same distance.

A typical electric vehicle will have a fuel efficiency of at least 120 mpge and some as high as 230 mpge if designed for a maximum driving range between charges. When these vehicles are charged using clean, renewable power such as solar or wind electricity, they can achieve an even higher MPGe rating than fossil-fueled cars. This is because no harmful substances (such as particulate matter) are emitted into the atmosphere during charging.

Electric car manufacturers often advertise EVs with 200+ mile ranges per charge; this means that some owners may only need to recharge their electrics once a week instead of up to three times per week when traveling less than 50 miles each day.

Factors That Affect Electric Car Efficiency

Many factors will affect your Electric Vehicle’s overall efficiency. The technology available in your electric vehicle will determine its efficiency as well as some external factors. Either way, the efficiency of your electric car will directly affect how it performs daily.

Electric Motors Affect EV Efficiency

Besides the emissions created to produce the electric motor, additional factors affect how efficiently it runs and affect mpg/consumption of power on a full charge. Electric vehicles use electricity from your home which, unless connected to solar-powered energy systems, will be creating additional pollution in the environment.

Efficiency Rating (The Higher, The Better)

You may have noticed that some cars have a graph on the window sticker with ratings from 100% to 12. The first number represents how efficient your vehicle is on the electric grid, and it’s rated by how many miles you can drive per kilowatt-hour of electricity.

A car below 150 kWh/100 mile will create optimal efficiency for an electric vehicle, but what about if you’re driving a hybrid car or running on gas? These numbers do not consider other factors such as charging inefficiencies which make them less than accurate when deciding whether or not to buy an electric car.

Charge Point Efficiency (The Lower, The Better)

The speed at which you charge your vehicle will affect how efficiently it uses the current that is available. Slow charging will use the current from the charger at a much lower efficiency, whereas fast chargers provide a more efficient and quick charge for your electric vehicle.

  • Level One Charger: This slower charging option uses a standard plug outlet to draw electricity from your home’s electrical grid and charges an electric car with around 30% efficiency.
  • Level Two Fast Charger: Installed inside or next to homes for residential customers, these chargers typically supply 120 volts alternating current (AC) directly into household electric circuits. Fast charges feed off of the 240-volt three-phase service lines coming out of the ground providing about 50 kW DC output up to 200 amps per circuit.

A few different factors affect electric car efficiency, including what type of charger you have installed on your vehicle and several other component systems in place to make it work smoothly.

Increase Efficiency by Keeping Up On Maintenance Schedules

To maintain your electric vehicle, you should be doing regular inspections of the:

  • Engine
  • Tire Pressure
  • Wheel Alignment

Regular maintenance helps to keep your electric vehicle running at peak efficiency, which will save money in fuel costs over time!

Regular maintenance can affect how efficient an electric car is by how often it has checkups and performes. Every 7,500 miles, electric vehicles require a checkup to ensure the power inverter and battery packs are in good condition. Because EVs still use liquid cooling, regular checkups also ensure there are acceptable levels of coolant and no leakage.

 The more time elapses between regular maintenance checks, the less efficiently your vehicle will operate because wear and tear occur on different parts that usually need replacing or tuning up after time passes from when they were last serviced.

How Far You Drive Each Day Determines Efficiency

This may seem like an insignificant factor at first. Still, it does make a difference in overall electric car efficiency because if you do no more than 35 miles daily on average, then it may not be worth converting to electric in the first place.

The reason being that your battery may degrade faster and make your EV less efficient over time. Very infrequent charges or consistent charges to 100% will degrade your electric vehicle’s battery more quickly than usual.

The Effects of The Weight of Your Vehicle And How You Drive

You may see a decrease in efficiency if you’re driving at higher speeds or taking bumpy roads instead of low-impact driving on smooth pavement. How you drive may affect efficiency by how much energy you use in accelerating and braking, so it’s essential to be mindful of your driving habits. Increase efficiency by making sure all the lights are turned off when not using them or reducing other factors such as heat inside the car with sunshades and seat covers.

The weight of your electric vehicle will also impact efficiency. Heavier cars can be more efficient if they have bigger batteries than lighter vehicles. Still, the trade-off is that heavier electric vehicles may need to charge for more extended periods before going a significant distance. Ultimately, you’ll want to weigh these factors and decide whether or not electric cars are right for you.

What Constitutes Electric Vehicle Electricity Use

Electricity use refers not only to the electricity required for powering an electric vehicle (EV) but also the energy used in manufacturing batteries, producing pollution from power plants, etc. Therefore, it is difficult or impossible to accurately measure EV efficiency without incorporating all these aspects of electricity production into one equation.

To measure the efficiency of electric cars, we must account for all types of electricity use – not just EV power consumption. For example:

  • The manufacture and disposal of batteries also consumes a lot of resources and releases pollution into our environment.
  • Manufacturing processes like producing steel required lots of fossil fuels that emit greenhouse gases into the atmosphere.

When you’re thinking about getting an electric car, one of the most important factors to consider is how efficient it will be. The average new gasoline-powered vehicle has a fuel efficiency of 36 mpg, whereas some electric cars can have up to 200 mpge.

Most electric vehicles use electricity supplied by power plants that generate it with coal, natural gas, or renewable energy sources such as solar panels or wind turbines. If most of our electricity comes from burning fossil fuels, then there will be an increase in carbon emissions, which can negatively impact air quality and climate change.

Electric Vehicle Efficiency and Why It Matters

Efficiency is one of the factors to consider when you’re thinking about getting an electric car. The energy consumption of your vehicle includes the power plant emissions and transmission losses. Electric vehicles are also more efficient because their engines don’t produce greenhouse gases as fossil fuels do.

To calculate how much electricity is used to charge a car, you would use this equation: miles traveled by electric vehicles divided by 100 multiplied times kWh used or mpg. If the electric car goes 45 miles on 15 kW, that equals 900 watts hours (45/100 * 15 = .900).

So, if you are driving 45 miles in your gas-powered car and use 0.25 gallons of gasoline, it will cost approximately $0.01 – which works out to less than one cent per mile. However, an electric car that goes 45 miles on 15 kW will use 900 watt-hours of electricity. This means the cost for charging your electric vehicle would be $0.87 – which is a little over one cent per mile.

Compare The CO2 Emissions Per Mile for Each Type Of Vehicle

To do this, you can use the EPA’s Greenhouse Gas Equivalencies Calculator.

There is an average of 17.54 pounds of CO₂ emissions per mile for electric cars and 162.24 pounds of CO₂ emissions per mile for gas-powered vehicles, meaning that there is a reduction in CO₂ emission by about 94%. There is also less maintenance required on electric cars because they have fewer moving parts than a gas-powered vehicle which could mean even more savings over time.

In general, electric cars produce less than half the amount of carbon dioxide emissions per mile as gasoline-powered vehicles. For comparison’s sake, an average new gasoline car produces 228.93 pounds (about 17 kilograms) CO₂/mile while driving 36 mpg. In contrast, an electric vehicle can emit 0 pounds (~0 kg) CO₂ if its fuel efficiency is rated at 45 miles on a 200 mpge battery pack.

The EPA has found 167 grams of greenhouse gas emitted for each kilowatt-hour used by electric-powered devices and 499 grams for every one kWh from gas-powered devices, which means that it emits about 68% fewer greenhouse gases. This also reduces air pollution in urban areas because traditional cars emit exhaust gases that contribute to smog.

The Difference Between Miles Per Gallon and Miles Per Kilowatt-Hour

Miles per gallon (MPG) is a measure of fuel efficiency in gasoline-powered vehicles. It can be calculated by dividing the number of miles driven by the total gallons used and multiplying that value by 100%. For electric cars, MPGe or Miles Per Gallon Equivalent considers electric motor efficiency and battery pack losses. An electric vehicle with an EPA rating between 200 mpge – 250 mpge is comparable to a gas-powered car getting 50 mpg on gas.

To calculate miles per kilowatt-hour (kWh), divide the number of miles traveled by how many kWh were consumed during those travels. Then multiply by one thousand to convert it from units of energy used for electricity consumption. This makes it easier to compare electric cars with gasoline-powered vehicles. For example, if an electric vehicle has a range of 100 miles and consumed 31 kWh during that time (31/100*1000), then the electric car efficiency is calculated at 310 MPG equivalent or 311 MPGe.

The Benefits of Electric Cars Over Gas-Powered Vehicles

Electric vehicles are better for the environment because they emit no harmful emissions and fossil fuels. The batteries in electric cars have a longer lifespan than those in gasoline-powered cars, which means that you can go further on less power. You also save money by not having to purchase new fuel every few weeks or so. Some additional advantages that electric vehicle possess include:

  • Electric cars are much quieter than gasoline-powered vehicles. This is because electric motors emit no sound when they’re running.
  • Electric motors require almost zero maintenance outside of tire rotations and brake pads. This means that drivers don’t have to spend money on gas anymore for their vehicles, which means more savings over time.
  • EVs have virtually no engine wear because these machines use four times fewer moving parts than traditional combustion engines. This also helps reduce weight from vehicles meaning less strain on tires and brakes.
  • EVs are less expensive to operate than gasoline-powered cars, as the cost of electricity is cheaper.

All of these advantages make electric vehicles a far superior purchase to traditional gas-powered cars.

Disadvantages Of Electric Cars Compared to Gas-Powered

Though electric vehicles are better for the environment and require much less maintenance than the average gasoline-powered vehicle, they still have a few disadvantages. Some of the disadvantages of electric cars when compared to gas-powered vehicles include:

  • Basic Electric Vehicles don’t have a very high top speed
  • The batteries must be charged daily to be sure there is enough range to get around.
  • EVs can require a long charge time. The amount of range can vary depending on the battery size.
  • Electric cars are expensive because many people still depend on gas for transportation, so there’s not much incentive to buy an electric vehicle.
  • Electric vehicles may be impractical in regions with cold climates or extremely rural areas as drivers have limited mobility if highways or busy streets aren’t available nearby.

These disadvantages are becoming less and less with the advancing technology used in electric vehicles. For example, Tesla’s Model S had been optimized to include the highest acceleration speed of any production car on the market.


If you’re considering purchasing an electric vehicle, it’s essential to know how efficiency is measured. The higher the EV efficiency (in terms of a ratio), then the more mileage your car will get on one full charge using less battery power in proportion to its total weight.

Other factors that affect EV efficiency are acceleration rates, braking mechanisms, driver habits, and terrain conditions. ” Electricity use” refers not just to power an electric vehicle but also includes any charging process from plugging into an outlet. One of the significant benefits of driving an electric car is that they are more energy-efficient than gas-powered cars. It’s easy to see why EVs have become increasingly popular over traditional vehicles.”

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