liminfoFuel Cost Calculator
Free web tool: Fuel Cost Calculator
Fuel Needed
41.7 L
Total Cost
75,000 won
CO2 Emissions
96.3 kg
About Fuel Cost Calculator
The Fuel Cost Calculator is a free, browser-based tool with two modes: a standard fuel cost estimator and an EV vs. gasoline comparison tool. In the fuel cost mode, users enter their trip distance, fuel efficiency (in either km/L or L/100km), and price per liter. The calculator instantly returns the total liters of fuel required, the total monetary cost, and estimated CO2 emissions — calculated at 2.31 kg of CO2 per liter of petrol burned.
The second mode — EV vs. Gas — allows users to compare the running cost of an electric vehicle against a conventional gasoline vehicle over the same distance. Users input the EV's energy consumption in kWh/100km and the local electricity price per kWh alongside the gasoline vehicle's efficiency and fuel price. The tool displays the cost for each vehicle and calculates the monetary savings and CO2 reduction from choosing the EV, helping drivers make data-driven decisions about vehicle ownership.
The dual efficiency input format (km/L and L/100km) makes the tool globally accessible: km/L is standard in Japan, Korea, and many Asian markets, while L/100km is the dominant format in Europe and Australia. The CO2 estimation uses the average emission factor for gasoline (approximately 2.31 kg CO2/L), making this useful not only for trip budgeting but also for environmental impact assessment and fleet management cost analysis.
Key Features
- Two calculation modes: standard fuel cost and EV vs. gasoline side-by-side comparison
- Dual efficiency input: supports both km/L and L/100km formats for international use
- CO2 emission calculation at 2.31 kg per liter of gasoline burned
- EV energy consumption input in kWh/100km with configurable electricity price
- Savings summary showing monetary and CO2 reduction when choosing an electric vehicle
- Shared distance input — enter trip distance once and both modes use the same value
- Real-time calculation — all results update instantly as any input changes
- 100% client-side processing — no trip or vehicle data is ever sent to a server
Frequently Asked Questions
How does the Fuel Cost Calculator calculate trip cost?
In km/L mode: Liters Used = Distance / Efficiency, then Cost = Liters × Fuel Price. In L/100km mode: Liters Used = (Efficiency / 100) × Distance, then Cost = Liters × Fuel Price. Both modes display the total liters consumed, the monetary cost, and estimated CO2 emissions.
How is CO2 emission calculated?
CO2 Emissions = Liters Used × 2.31 kg/L. The factor 2.31 kg CO2 per liter represents the average CO2 emission from burning one liter of petrol, derived from the carbon content of gasoline (~86% carbon by weight) and the stoichiometry of combustion. This is a reasonable estimate for standard unleaded petrol; diesel and other fuels have slightly different factors.
What is the difference between km/L and L/100km?
km/L (kilometers per liter) tells you how far a vehicle travels on one liter of fuel — higher is more efficient. L/100km (liters per 100 kilometers) tells you how many liters are consumed over 100 km — lower is more efficient. To convert: L/100km = 100 / (km/L). The calculator accepts either format and converts internally for calculation.
How does the EV vs. Gas comparison work?
Both vehicles use the same trip distance input. For gasoline, the cost is calculated using km/L efficiency and fuel price per liter. For the EV, the cost is: (kWh/100km × Distance / 100) × Electricity Price. The tool then subtracts EV cost from gasoline cost to show the monetary savings, and uses the gasoline CO2 figure to show the emissions reduction from choosing the EV.
What kWh/100km value should I enter for my EV?
kWh/100km is the energy consumption rating of your electric vehicle. Most modern EVs consume between 14–22 kWh/100km depending on size, weight, and driving conditions. You can find this figure in your vehicle's manual, the manufacturer's specification sheet, or on the dashboard energy display. A typical compact EV averages around 16 kWh/100km.
Can I calculate fuel cost for diesel vehicles?
Yes. Enter the diesel price per liter in the fuel price field and the vehicle's diesel efficiency in km/L or L/100km. The monetary cost calculation is identical. Note that the CO2 estimate uses a petrol factor (2.31 kg/L); diesel actually emits about 2.68 kg CO2/L, so the CO2 figure will be slightly understated for diesel vehicles.
How do I calculate the cost of a long road trip?
Enter the total trip distance in the distance field. For example, for a 1,200 km road trip with a 12 km/L car and fuel at ₩1,800/L: Liters = 1200/12 = 100L, Cost = 100 × 1,800 = ₩180,000. The calculator performs this instantly and also shows the CO2 impact of the journey.
Is the Fuel Cost Calculator free?
Yes — completely free, no account needed, no usage limits. All calculations happen in your browser. No trip distance, vehicle data, or fuel price information is uploaded or stored anywhere.