liminfoFuel Cost Calculator
Free web tool: Fuel Cost Calculator
Default: 1650
About Fuel Cost Calculator
The Fuel Cost Calculator estimates the total cost of a road trip or regular commute based on distance, vehicle fuel efficiency, and current fuel price. It supports all four major fuel types used in Korean vehicles: gasoline (휘발유), diesel (경유), LPG, and electric (전기). By entering just three values, you instantly see the total fuel cost, how many liters or kWh are needed, and the per-kilometer running cost.
Road trip planners, daily commuters, fleet managers, and car buyers commonly use fuel cost calculators to budget driving expenses, compare the operating economics of different vehicles, or decide whether a trip by car versus public transport is cost-effective. The tool provides sensible default fuel prices — 1,650 KRW/L for gasoline, 1,450 KRW/L for diesel, 1,000 KRW/L for LPG, and 300 KRW/kWh for electricity — which you can override with current market prices.
The calculation formula is straightforward: Fuel Needed = Distance ÷ Fuel Efficiency, and Total Cost = Fuel Needed × Fuel Price. For electric vehicles, fuel efficiency is expressed in km/kWh rather than km/L, and the price unit changes to KRW/kWh accordingly. All four metrics — total cost, fuel needed, cost per km, and applied price — are displayed simultaneously so you can make informed comparisons.
Key Features
- Supports four fuel types: Gasoline, Diesel, LPG, and Electric with appropriate units
- Calculates total fuel cost, fuel needed (L or kWh), and cost per km
- Preset default prices: Gasoline 1,650 KRW/L, Diesel 1,450 KRW/L, LPG 1,000 KRW/L, Electric 300 KRW/kWh
- Custom price override — enter today's actual pump price for precise results
- Dynamic unit labels: km/L for combustion engines, km/kWh for electric vehicles
- Four result cards showing total cost, fuel needed, cost/km, and applied price simultaneously
- 100% client-side calculation — no data sent to any external server
- Responsive two-column layout with dark mode support
Frequently Asked Questions
How does the fuel cost calculation work?
The calculator divides your trip distance by your vehicle's fuel efficiency to find how much fuel is needed (Distance ÷ Efficiency = Fuel Needed). It then multiplies fuel needed by the fuel price to get the total cost (Fuel Needed × Price = Total Cost). Cost per km is derived as Total Cost ÷ Distance.
What fuel efficiency should I enter for my car?
Enter the real-world fuel efficiency of your vehicle, not the manufacturer's lab rating. Korean vehicles typically achieve 10–15 km/L for gasoline sedans, 14–18 km/L for diesel vehicles, 10–13 km/L for LPG vehicles, and 5–7 km/kWh for electric vehicles depending on driving conditions.
How do I use this for an electric vehicle?
Select the "Electric" fuel type. Enter your EV's efficiency in km/kWh (found in your car's manual or instrument cluster). The default charging price is set to 300 KRW/kWh which approximates typical public fast-charger rates in Korea, but home charging is usually cheaper (around 100–130 KRW/kWh off-peak).
What is the default gasoline price and can I change it?
The default gasoline price is 1,650 KRW/L, which approximates the average Korean pump price. You can enter any value in the fuel price field to use the current price at your nearest gas station. The field shows the default used if left blank.
Can I calculate costs for a round trip?
Yes, simply double your one-way distance. For example, a 150 km round trip should be entered as 300 km. The calculator then shows the total fuel cost and consumption for the entire trip.
Why is diesel cheaper to run than gasoline even with similar efficiency?
Diesel typically costs less per liter (around 200 KRW/L less than gasoline in Korea) and diesel engines usually achieve higher km/L figures. Both factors reduce the per-km cost, which is why diesel vehicles often have lower running costs despite higher purchase prices.
Is LPG available for all vehicles?
In Korea, LPG vehicles are primarily taxis, rental cars, and certain older models. Private passenger cars can also use LPG but require a certified LPG conversion. LPG typically costs around 1,000 KRW/L and offers moderate fuel efficiency, making it competitive for high-mileage drivers.
How can I minimize my fuel costs?
The most effective way to reduce per-km fuel costs is to improve fuel efficiency: maintain proper tire pressure, avoid rapid acceleration, use cruise control on highways, and reduce unnecessary weight in the vehicle. For longer term savings, compare the cost per km of different fuel types using this calculator to evaluate your next vehicle purchase.