All You Need to Know About Car Mileage Calculation in India

How to Calculate Your Car’s Average Gas Mileage

Simply purchasing the best mileage cars isn’t enough. You should also know how to calculate its mileage under real-world driving conditions. It will help you understand why you have to refuel your car more than expected.

Here’s the easiest way to determine your car mileage in India. Divide the total distance travelled by the fuel consumed, and you’ll receive the mileage. If you’re still confused, let’s check it with an example. Let’s assume your car has travelled 300 km using 20 litres of fuel. In this case, your car’s average mileage is 15 kmpl (300 ÷ 20).
 

What is Fuel Efficiency and Why Does it Matter

Your car’s fuel efficiency is a direct measure of how efficiently your car converts fuel into distance travelled. It matters more than you realise because it influences your monthly fuel expenses, and eventually your budget. Higher fuel efficiency means you can travel the same distance using less fuel.

Since petrol and diesel prices in India are usually higher, your car’s fuel efficiency can make a significant difference to your monthly fuel expenses. Even a slight difference of 2-3 kmpl can noticeably impact your budget.

Higher fuel efficiency also indicates reduced engine strain and lower emissions. It makes cars more economical and environmentally responsible.
 

How to Check Car Mileage Manually

If you want to do mileage calculation manually, we’d suggest using the tank-to-tank method. Here’s how to calculate car mileage in India using the tank-to-tank method.

• Fill your tank to the full capacity.
• Reset the trip meter to zero immediately after refuelling. You can use the odometer reading if your car doesn’t have a trip meter.
• Drive like you usually do.
• Refill the tank again only once the fuel level drops to near the reserve level. You should note the amount of fuel refilled.
• Now check your car’s trip meter or odometer reading to find out how many kilometres you drove.
• Divide the distance travelled (km) by the fuel used (litres) to get the accurate mileage.

If you’re using the tank-to-tank method for mileage calculation, avoid partial fuel refills in between, as it can distort the result.
 

How to Calculate the Average of a Car Using Fuel Records

Calculating petrol car mileage using past fuel records is a smart decision because it gives more realistic, long-term figures. Here’s how you calculate it.

• Maintain a fuel log to record details such as the refuelling date, odometer reading (or trip meter reading), and litres of fuel filled.
• You must record entries across multiple refuelling cycles.
• Calculate the total distance travelled by deducting the final odometer reading from the initial reading.
• Calculate the total fuel consumed by adding up all the fuel litres filled across those entries.
• Now, divide the total distance travelled by the total fuel consumed to get the average mileage.

We’d suggest record entries for at least 3 to 5 refuelling cycles. However, the more cycle entries, the better.
 

Knowing the Mileage Calculator Formula

One of the simplest ways to calculate car mileage in India is to use the following formula:

Mileage (kmpl) = Distance Travelled ÷ Fuel Consumed

Although the formula is simple, you can only get an accurate mileage figure if you provide the right details about the distance travelled and the fuel consumed. Any measurement inconsistency can make the result unreliable.
 

The Role Tyres Play in Fuel Efficiency

Tyres don’t get the attention they deserve when assessing a car’s mileage. If you truly want to improve your car’s mileage, you must understand how car tyres affect fuel efficiency. Underinflated tyres increase rolling resistance, forcing the engine to burn more fuel for the same distance.

Even misaligned or uneven tyre wear can create additional drag, which drivers usually don’t notice. Surprisingly, the tyre types matter too. For instance, wider tyres or performance-focused tyres might reduce fuel efficiency compared to standard tyres. Hence, one of the best ways to improve your car’s mileage is to maintain optimal tyre pressure.
 

Tips to Improve Your Car’s Mileage

Simply purchasing the best mileage cars isn’t enough. You also have to maintain optimal mileage by improving your driving style and keeping tyre pressure at the ideal level. We’ve shared a few tips every car owner should follow to improve fuel economy.

Drive with Consistency

If your driving includes frequent acceleration and braking, you’re unknowingly wasting more fuel. It will reduce your car’s mileage over time. You can avoid it by driving at a steady speed. This simple shift can help you maintain optimal mileage for petrol and diesel cars.

Don’t Carry Unnecessary Load

Your car’s engine will require more fuel to drive a car with an excessive load. It can directly lower your car’s mileage. Hence, only carry what’s necessary.

Avoid Congestion by Route Planning

Always use maps with real-time traffic alerts to avoid congested routes. It will help you improve your petrol/diesel and CNG car mileage, as you’ll spend less time in traffic. Less traffic means reduced fuel wastage from idling and stop-and-go.

Keep the Tyres Properly Inflated

Your car’s tyre inflation can directly influence its mileage. Both underinflated and overinflated tyres can reduce your car’s fuel efficiency. Hence, keep doing regular checks to ensure optimal performance and lower fuel consumption.
 

Types of Car Mileage

There are usually four types of car mileage, as listed below.

ARAI Mileage

It refers to the mileage a car delivers under controlled conditions. Most manufacturers share ARAI mileage as a benchmark.

Real-World Mileage

It’s the mileage your car delivers in real-world driving conditions. It varies significantly from ARAI mileage because real-world driving conditions differ from the controlled environments in which manufacturers test their cars. Hence, real-world mileage usually differs from ARAI mileage.

Highway Mileage

It’s the mileage your car delivers when driving on highways. Since cars can maintain a steady speed on highways without frequent braking, mileage improves significantly.

City Mileage

City mileage refers to the mileage your car delivers in regular city driving environments. It’s usually lower than highway mileage because city traffic means congestion, idling, and frequent gear changes.
 

Factors That Affect Car Mileage

Some individuals mistakenly believe that a car’s mileage is fixed and unaffected by driving habits or other external conditions. In reality, car mileage in India is affected by the following factors.

Driving Behaviour

Your driving behaviour affects your car's mileage more than you realise. Aggressive driving usually increases fuel consumption, while smooth driving improves fuel efficiency.

Road Conditions

Driving on uneven or inclined roads will make your car consume more fuel. It can significantly lower your car’s mileage.

Traffic Conditions

Conditions such as stop-and-go traffic demand higher fuel consumption. Driving regularly in such traffic conditions can gradually lower your car’s fuel efficiency.
 

Best Mileage Cars in India

We’ve handpicked some of the best mileage cars in India that deserve your attention.

Final Thoughts

As a car owner, your vehicle’s mileage is one of the most important metrics you can keep track of. It’s less about chasing the highest kmpl and more about knowing what your car should deliver and why it sometimes doesn’t.

You can use the formulas and methods shared in this blog to perform independent mileage calculations and follow the tips to improve them over time. If you’re planning to purchase the best mileage cars in India, please remember to secure them under our Comprehensive Car Insurance policy at Shriram General Insurance.
 

FAQs

1. Is there a formula I can use to get my car’s mileage?
Yes. The formula is: Mileage = Distance Travelled ÷ Fuel Consumed.

2. Which Indian provides good mileage?
Although there are numerous high-mileage cars, you should consider options such as the Maruti Suzuki Swift and the Kia Sonet. Maruti Suzuki Swift’s mileage = 25.75 kmpl, Kia Sonet’s mileage = 24.1 kmpl.
 

3. Why does my car mileage differ on city roads and highways?
It differs because your car maintains a steady speed on highways with minimal braking. It leads to higher mileage on highways. City roads have congestion and stop-and-go traffic, which usually reduces cars’ mileage.
 

4. Which is the most accurate way to calculate mileage?
The tank-to-tank method is the most accurate way to calculate your car’s mileage.
 

5. Can driving habits really influence car mileage?
Yes. Smooth driving improves fuel efficiency, while aggressive driving reduces car mileage.