### How Fuel or Gas Mileage Calculated?

**Fuel or gas mileage** is calculated by dividing the distance traveled by the amount of fuel consumed. It is usually measured in **miles per gallon (MPG)** in the **United States, Canada** and **kilometers per liter (km/L)** in other countries. This calculation is essential because it helps vehicle owners determine how fuel efficient their cars are and estimate their fuel costs.
To **calculate gas mileage** accurately, you need to measure the **amount of fuel** you put in the tank and **the distance you cover** on that fuel. You can do this manually by keeping track of the **amount of fuel** you buy and the miles you drive or by using this **Gas Mileage Calculator** or **MPG Calculator**.
The calculation can be done by **dividing the total distance traveled** by **the total amount of fuel consumed**. For example, if you traveled 300 miles and used 10 gallons of fuel, your **gas mileage would be 30 MPG**. Similarly, if you drove 400 km and consumed 40 liters of fuel, your gas mileage would be 10 km/L. For example, if you traveled a distance of **300 miles and used 10 gallons of gas**, the calculation would be:
**MPG** = 300 miles ÷ 10 gallons
**MPG** = 30
This means that your vehicle has an **average gas mileage of 30 miles per gallon**. By using our **Gas Calculator**, you can easily input the values for distance and amount of gas used and the calculator will **calculate the MPG** for yourself easily.

### What Is A Good Gas or Fuel Mileage?

A good gas mileage can vary depending on the type of vehicle you have, its age, and its size. However, as a general guideline, a fuel-efficient car should get at least **30 miles per gallon (MPG) on the highway** and at least **25 MPG in the city**.Keep in mind that these are just guidelines, and some vehicles may have significantly better or worse gas mileage than this. Additionally, your driving habits, the condition of your vehicle, and other factors can also impact your gas mileage.
Ultimately, what constitutes a "good" gas mileage is subjective and **dependent on individual needs and preferences**. Some people may prioritize fuel efficiency above all else, while others may be willing to sacrifice some gas mileage for a larger or more powerful vehicle.