MPG and KM/L Calculator - Gas Mileage Calculator

Calculate your vehicle's fuel efficiency using our MPG and KM/L calculator. Enter the distance traveled in miles or kilometres and fuel consumed in gallons or litres, and instantly get the miles per gallon (mpg) or kilometers per liter (km/l).

The Fuel Efficiency Calculator, also known as the MPG Calculator or Miles Per Gallon Calculator, is an invaluable tool that empowers you to accurately calculate your fuel consumption.
Whether you're planning a trip and want to estimate the cost beforehand or simply curious about your gas mileage over a specific distance, this calculator eliminates the need for complex manual calculations. Within seconds, our Fuel Efficiency Calculator provides you with an instant estimate, giving you peace of mind and clarity.

In the following sections, we will delve deeper into the topic, covering:

  • What is MPG; and
  • How to use the fuel efficiency calculator.

What is MPG?

MPG also known as Gas mileage refers to the relationship between the distance you travel and the amount of fuel consumed. Several factors influence your gas consumption, including the make and model of your vehicle, the production year, engine size, and your driving efficiency.

For example, the 2012 Honda Fit, produced in 2012, boasts an average gas mileage of 27 mpg for city drive. Understanding your car's fuel consumption is crucial for accurately estimating the amount of petrol you need to cover a specific distance.

To calculate fuel efficiency using the imperial system, utilize the following formula:

MPG = Distance (miles) / Average gas consumption (gallons)

However, the process becomes significantly easier and more efficient with the MPG Calculator. You can also use our MPG to L/100Km Calculator to convert your MPG to liters per L/100km.

2. How to Use the Fuel Efficiency Calculator?

The Fuel Efficiency Calculator estimates your gas mileage based on the distance covered and the average fuel consumption of your vehicle. To utilize this tool effectively, simply provide the following inputs:

  • Distance: Enter the distance you plan to travel.
  • Fuel Economy: Input the average fuel consumption of your vehicle.

Once you've provided these details, the MPG Calculator will swiftly calculate the total amount of fuel required for your entire route, allowing you to plan your journey with precision and confidence.

Frequently Asked Questions

The fuel tank capacity varies depending on the size of your car, typically ranging from 12 to 16 gallons. For specific details, referring to your vehicle's owner's manual is highly recommended.

Modern cars utilize engine control systems to monitor fuel consumption and distance traveled. By dividing the distance covered in miles by the amount of fuel consumed in gallons, the car's computer can accurately display the average MPG (miles per gallon) value.

To calculate the MPG of your car, follow these steps:
  1. Record the number of miles traveled.
  2. Determine the amount of fuel consumed in gallons.
  3. Divide the distance in miles by the fuel amount in gallons.

The result will be the MPG of your car for that particular trip.

Assuming your car has the average MPG of 25 miles per gallon in the United States, you would require approximately 12 gallons of fuel. To calculate this, divide 300 miles by 25 MPG, resulting in 12 gallons.

Several factors can impact your MPG while driving, including:
  • Driving aggressively (such as fast acceleration, braking, and high speeds)
  • Cold weather conditions, as engines operate most efficiently at specific temperatures
  • Towing a trailer or utilizing a roof rack, which adds extra weight and requires more energy
  • Air conditioning usage
  • Four-wheel-drive operation compared to two-wheel-drive

For further information on fuel efficiency and related topics, you can explore credible sources such as Wikipedia's page on "Fuel economy in automobiles".


With the Fuel Efficiency Calculator by your side, you can optimize your journey, make informed decisions, and contribute to a more efficient and sustainable future. Begin using this invaluable tool today and experience the benefits of accurate fuel consumption calculations like never before.

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