Fuel Consumption Calculator
Calculate your vehicle's fuel consumption and fuel economy using the distance traveled and amount of fuel used.
Get results in km/L, L/100 km, and MPG so you can compare vehicle efficiency using different fuel-economy standards.
Calculate Fuel Consumption
Enter the distance traveled and the amount of fuel used.
Fuel Consumption Result
Fuel Consumption Summary
Distance
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Fuel Used
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Fuel Economy
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Consumption
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What Is Fuel Consumption?
Fuel consumption describes how much fuel a vehicle uses to travel a particular distance. It is commonly expressed as liters per 100 kilometers (L/100 km), while fuel economy may be expressed as kilometers per liter (km/L) or miles per gallon (MPG).
The amount of fuel a vehicle consumes depends on factors such as engine efficiency, vehicle weight, speed, traffic, road conditions, tire pressure, weather, and driving style.
Fuel Consumption Formulas
Fuel Economy (km/L) = Distance (km) ÷ Fuel Used (L)
Fuel Consumption (L/100 km) = Fuel Used (L) ÷ Distance (km) × 100
MPG = Miles Traveled ÷ US Gallons Used
The calculator converts your entered distance and fuel quantity into compatible units before calculating the different fuel-efficiency measurements.
Fuel Consumption Examples
| Distance | Fuel Used | Fuel Economy | Consumption |
|---|---|---|---|
| 100 km | 5 L | 20.00 km/L | 5.00 L/100 km |
| 500 km | 33.33 L | 15.00 km/L | 6.67 L/100 km |
| 300 mi | 10 gal | 30.00 MPG | 7.84 L/100 km |
Understanding Fuel Economy Measurements
Kilometers per Liter (km/L)
km/L tells you how many kilometers a vehicle can travel using one liter of fuel. A higher km/L number generally means better fuel economy.
Liters per 100 Kilometers (L/100 km)
L/100 km tells you how many liters of fuel a vehicle uses to travel 100 kilometers. Unlike km/L, a lower L/100 km number indicates better fuel efficiency.
Miles per Gallon (MPG)
MPG measures how many miles a vehicle can travel using one US gallon of fuel. A higher MPG value generally means better fuel economy.
Tips for Measuring Real-World Fuel Economy
For a useful real-world estimate, record the distance traveled and fuel added over several trips instead of relying on a single short journey.
Keeping tire pressure at the recommended level and avoiding unnecessary vehicle weight can help maintain efficient fuel consumption.
Comparing fuel economy under similar driving conditions gives a more meaningful picture of vehicle efficiency.
Fuel Consumption Calculator FAQ
How do I calculate fuel consumption?
Divide the amount of fuel used by the distance traveled and multiply by 100 when calculating L/100 km. The calculator performs the conversion automatically.
What is the difference between km/L and L/100 km?
km/L measures how far a vehicle travels per liter, so higher values are better. L/100 km measures how much fuel is needed for 100 kilometers, so lower values are better.
Can I calculate MPG?
Yes. Enter your distance in miles and fuel used in US gallons to calculate MPG.
Does higher MPG mean better fuel economy?
Yes. A higher MPG value means the vehicle can travel farther using the same amount of fuel.
Does lower L/100 km mean better fuel economy?
Yes. A lower L/100 km value means the vehicle uses less fuel to travel 100 kilometers.
Why can my real-world fuel economy differ?
Actual fuel economy can vary because of traffic, speed, weather, road conditions, vehicle load, tire pressure, maintenance, and driving style.