How to Calculate the Mileage of a Car in India?

If you are planning a trip or buying a car, the first factor that comes to your mind is the car's mileage. Knowing how to calculate your car's mileage can help you make an informed decision.  Checking the car's mileage often helps you proactively use the fuel in your vehicle. 

Monitoring your mileage also helps you avoid getting stuck in the middle of the road while driving. This article will comprehensively guide you through calculating mileage, helping you avoid common mistakes.

The distance a vehicle can travel on a set quantity of fuel is known as car mileage. This is important for car buyers, as it directly impacts fuel expenses and the total value of a vehicle's resale. Car mileage is calculated by considering the distance a vehicle travels on a specific amount of fuel. 

The unit is represented in kilometres or miles per litre (km/l or m/l), which helps estimate the amount of fuel burned on a particular journey. Understanding the car's mileage is vital because it helps you check your out-of-pocket fuel expenditure. This also allows you to save the overall cost of maintaining your vehicle.

There are several methods through which you can calculate your car's mileage. Here's a breakdown of the key methods:

Fuel Tank Method

This is the traditional method to calculate the car's mileage. Mileage is calculated by filling the fuel tank, recording the odometer reading, driving for a distance, and refuelling. Now note the odometer reading (distance travelled) and fuel consumed, and use the mileage formula to get your mileage.

Fuel Mileage Calculators

In this method, you don't need to use any formula to calculate the mileage. Instead, you must fill your fuel tank, record your odometer reading, drive your car for a distance, and refuel it. Now, take the reading of the distance travelled and fuel consumed and put it in the fuel mileage calculator to get your mileage.

Using Mobile Applications

This method uses various mobile applications to calculate your mileage. Some of the popular applications are "Fulley" and "MileQ". This method works similarly to the above methods. Here, the app keeps track of your mileage and calculates mileage even for purposes like tax deductions and reimbursements.

Knowing your car's mileage will help you track the fuel used and how effectively you can use it. Here is the step-by-step procedure to calculate car mileage:

Step 1: Fill Up The Fuel Tank

Clearing up the fuel tank is the first step in calculating car mileage. Then, fill the tank with fuel. This makes the process easy, as you know the quantity of fuel you fill. Thus, it enhances the accuracy of mileage measurement.

Step 2: Check The Reading Of The Odometer

Reset the odometer to zero in your car or take note of the initial reading. This ensures easy reading and monitoring without any confusion or previous data interference, enhancing the calculation effectively.  

Step 3: Drive As Usual

Drive as usual without any fluctuation, i.e., maintain a constant speed. This eliminates any external factor influencing fuel efficiency, like sudden accelerations or unnecessary detours, making the calculation more accurate.

Step 4: Refuel Your Car

Refuel your fuel tank after driving a specific distance to the mark you initially filled. Note down the amount of fuel refilled. This gives an idea of the total fuel consumed in the journey, ensuring the calculation is more precise and accurate. 

Step 5: Calculate Fuel Consumption

The formula for calculating the mileage is like doing simple math. Divide the distance travelled by the fuel consumed to refill the tank. The result gives the car's mileage, expressed in the unit kilometre per litre (km/l). 

Step 6: Check Periodically

To get more accurate results, repeat the process a few times. Average the mileage reading you got from each attempt. This gives a consistent and reliable measure of your car's fuel efficiency and mileage accurately. Check periodically to ensure reliability.

The car mileage calculation is as simple as doing secondary-level math. Here is the formula and the steps to calculate the mileage of your car:

Car Mileage  =  (Second Odometer reading - First Odometer reading) / Number of litres of fuel filled

Knowing the factors that affect your car's mileage is crucial. Here are a few factors that impact your car mileage: 

Driving Habits

Aggressive driving, such as rapid acceleration, unusual braking and driving at an unstable speed, reduces fuel efficiency and mileage. Maintaining a stable speed and avoiding jerks can help improve mileage.

Engine Condition

Maintenance of the engine is crucial for increasing fuel efficiency and mileage. The more worn the engine is, the less fuel efficiency and mileage it has. Therefore, maintain your engine correctly.

Tyre Pressure

Under-inflated or flat tyre increases the tyre's rolling resistance. This leads to increased friction and heavy fuel consumption. This results in poor mileage and fuel efficiency in your car.

Fuel Quality

Low-quality or higher-contaminant fuel leads to partial fuel combustion. This causes unwanted contaminants to build up in the engine, reducing the engine's efficiency and the car's mileage.

Use of Air Conditioning

Air conditioning adds an extra load to the engine, which leads to higher fuel consumption and decreases the car's mileage capacity. Therefore, using AC wisely, especially at lower speeds, can increase mileage.

Maintenance and Service

Regular maintenance and service, such as oil changes, air filter replacement, and fuel system cleaning, ensure the engine's better performance and help improve fuel economy.

Calculating your car's mileage is vital for making an informed decision regarding sustainable fuel consumption. However, there are some common mistakes you may commit while calculating, including:

Forgetting to Reset the Odometer

If you forget to reset the odometer or to note your car's initial reading, the calculation will be confusing. Therefore, be conscious of noting the odometer's reading or resetting it before initiating your journey.

Overestimating or Underestimating the Fuel Used

The inaccurate noting of the fuel consumed can lead to errors while calculating the mileage. This results in erroneous mileage for your car. So, keep track of your fuel to improve accuracy.

Driving on Uneven Routes

Driving on uneven routes, such as hills, curvy paths, or poorly maintained roads, leads to unstable acceleration and speed, which in turn leads to inaccurate mileage results. Try to maintain a constant speed for better accuracy.

Ignoring Seasonal Changes

Fuel efficiency can be affected by weather conditions like heat waves. Heat waves lead to increased AC usage, which in turn increases fuel consumption. Therefore, choose the ideal location while calculating.

Not Repeating the Process

Calculating the mileage once leads to erroneous mileage. The accuracy can only be improved by taking the reading more times and averaging it. Henceforth, take as much reading as possible to enhance the accuracy.

Regular tracking of your car's mileage allows you to save your out-of-pocket expenditure on fuel. Knowing your car's mileage makes you make an informed decision while purchasing a vehicle or when you're up on a journey. Easy practices like resetting or writing the initial odometer reading and the corresponding fuel reading assist in developing the accuracy of mileage calculation.