# Quick Answer: How do you measure the efficiency of an electric car?

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In theory, electric car economy can be calculated by using a car’s battery capacity and its official range. For example, an electric car with a 40 kWh battery pack and a 100-mile range would have an economy/consumption figure of 2.5 miles/kWh.

## How is electric vehicle efficiency measured?

MPGe is the official metric that the EPA uses to measure the efficiency of alternative-fuel (including electric) vehicles. … Just like regular MPG shows how far a car will travel on one gallon of gas, MPGe shows how far a vehicle will drive on 33.7 kWh of electricity – the energy equivalent of one gallon of gasoline.

## How is car efficiency measured?

Do the math.

1. MPG = (Mileage B – Mileage A)÷Gallons.
2. Subtract Mileage A from Mileage B. This will give you the number of miles you drove since your last fill-up.
3. Divide your answer by the number of gallons (Gallons B) it took to fill up your tank. This will give you your car’s MPG.

## What is the overall efficiency of an electric car?

For an electric vehicle, energy efficiency is estimated at 90%, meaning that 10% of the electricity consumed by the electric motor has not been used in the propulsion of the vehicle — not a very large amount.

## How do you calculate the energy consumption of an electric car?

The acceleration and braking energies are calculated separately and then summed up to give the total energy. By dividing the last calculated value of the total energy ( 3205.39 Wh ) to the total length of the WLTC drive cycle ( 23.266 km ), we get the average energy consumption of the vehicle, 137.8 Wh/km .

## What is a good kWh per mile?

The average electric car kWh per 100 miles (kWh/100 mi) is 34.6. This works out as 0.346kWh per mile. In other words, on average, electric cars consume 34.6kWh to travel 100 miles and 0.346kWh to travel 1 mile.

## How many kWh does it take to drive 100km?

In EVs, it’s kilowatt-hours — hence the Tesla Model 3 Standard Range Plus’ official rating of 14.9 kWh per 100 kilometres. Substitute free electrons (kWh per 100 kilometres) for 93 octane (the L/100 kilometres we’re all familiar with) and the ratings are virtually identical.

## How do I manually calculate mpg?

Take the number of miles that elapsed between tank fills, and divide that by the number of gallons it took to refill your tank. The number you get is how many miles per gallon you are yielding. To simplify, the formula is: miles driven ÷ gallons used = mpg.

## How do you read mpg?

Gas mileage is measured in mpg. For instance, if your vehicle gets 30 mpg, it travels 30 miles per one gallon of gas. The mpg is usually higher on highways compared to city driving since city driving necessitates slower speeds, idling, and higher revolutions per minute (rpm).

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## How do you calculate mpg?

The formula to calculate gas mileage: Miles driven ÷ gallons used to refill the tank. Take the miles traveled (from the trip computer), divide that by the number of gallons used to refill the tank.

## How many KW is an electric car?

An average electric car consumes approximately 0,20 kWh/km.

On favourable weather conditions the consumption can be even 0,15 kWh or less, but year-around average in most countries is closer to 0,2 kilowatthours.

## How far can you drive on 1 kWh?

On average, most electric cars can travel 3 to 4 miles on 1 kWh of electricity.

## How do you calculate kW to kWh?

How Do You Calculate kWh vs. kW?

1. Divide the wattage by 1,000 to calculate kW: 1500 watts 1,000 = 1.5 kW.
2. Multiply the kilowatts by the hours of daily use: 1.5 kW X 2 hours = 3 kWh per day.
3. Find the total energy usage for a month (30 days): 3 kWh X 30 days = 90 kWh per month.

## How many kW is a kWh?

1 kWh equals one hour of electricity usage at a rate of 1 kW, and thus the 2 kW appliance would consume 2 kWh in one hour, or 1 kWh in half an hour. The equation is simply kW x time = kWh.