Calculate Fuel Consumption Litres per 100km

Fuel consumption in litres per 100km (L/100km) is a standard measure of vehicle efficiency. This calculator helps you determine how many litres of fuel your vehicle uses to travel 100 kilometers, which is particularly useful for comparing fuel economy between different vehicles or fuel types.

How to Calculate Fuel Consumption

To calculate fuel consumption in litres per 100km, you need to know two key pieces of information:

The total amount of fuel used (in litres)
The total distance traveled (in kilometers)

The basic calculation involves dividing the total fuel used by the total distance traveled, then multiplying by 100 to get the consumption per 100 kilometers.

The Formula

The standard formula for calculating fuel consumption in litres per 100km is:

Fuel Consumption (L/100km) = (Total Fuel Used ÷ Total Distance) × 100

Where:

Total Fuel Used is the amount of fuel consumed in litres
Total Distance is the distance traveled in kilometers

This formula gives you a direct measure of how much fuel your vehicle uses per 100 kilometers of travel.

Worked Example

Let's say you filled your fuel tank with 50 litres and drove 500 kilometers. Here's how to calculate your fuel consumption:

Fuel Consumption = (50 ÷ 500) × 100 = 10 L/100km

This means your vehicle uses 10 litres of fuel for every 100 kilometers traveled.

Interpreting Results

The fuel consumption result in litres per 100km provides several important insights:

Vehicle Efficiency: Lower numbers indicate better fuel efficiency
Cost Comparison: Helps estimate fuel costs for different vehicles
Environmental Impact: Lower consumption means less fuel burned per kilometer

Typical fuel consumption ranges vary by vehicle type and fuel efficiency. For example, a small car might have a consumption of 6-8 L/100km, while a large SUV might consume 10-14 L/100km.

FAQ

Why is litres per 100km a common measure?: Litres per 100km is widely used because it provides a clear comparison of fuel efficiency across different vehicles and distances. It's particularly useful for long-distance travel where fuel costs can be significant.
How accurate is this calculation?: The calculation is precise based on the fuel used and distance traveled. For the most accurate results, use measurements from a fuel gauge and odometer that are as precise as possible.
Can I use this for electric vehicles?: While the calculator works for electric vehicles, the result represents energy consumption in kilowatt-hours per 100km rather than fuel consumption. For EV efficiency, consider using a kWh/100km calculator instead.
What's a good fuel consumption rate?: Good fuel consumption rates vary by vehicle type. A typical gasoline car might have 7-9 L/100km, while a diesel car might be around 5-7 L/100km. Hybrid and electric vehicles generally have much lower consumption rates.
How can I improve my vehicle's fuel efficiency?: Improving fuel efficiency can be achieved through regular maintenance, proper tire pressure, smooth driving, avoiding excessive idling, and using the recommended fuel grade for your vehicle.