Select Car Model
Estimated Trip Cost
Efficiency varies based on driving style and traffic.
How to Use the Calculator
Search for your car model to load official efficiency, or enter it manually.
Enter the distance you plan to travel. "Required Fuel" is calculated automatically.
Adjust the fuel price based on your local station to get a more accurate estimate.
Eco-Driving Habits
Small changes in driving style can lead to significant fuel savings over time.
Predictive Braking
Avoid sudden braking by looking ahead and lifting your foot early. This uses the engine's "Fuel-cut" and saves brake pads.
Cruise Control
On flat highways, cruise control helps maintain a steady speed, preventing the micro-accelerations that waste fuel.
Window vs AC
Below 60km/h, open windows are better. Above 60km/h, close them to reduce drag and use the AC efficiently.
Fuel Saving & Driving Tips
Maintain Tire Pressure
Under-inflated tires increase rolling resistance, reducing efficiency by up to 3%.
Smooth Acceleration
Abrupt starts and stops consume significantly more fuel. Gentle driving saves money.
Remove Extra Weight
Clean your trunk. Every 50kg of extra weight reduces efficiency by about 1-2%.
Idling Minimization
Modern engines don't need long warm-ups. Turn off the engine during long stops.
Seasonal Fuel Efficiency
Weather conditions can impact your car's performance and fuel consumption.
Winter: Engines take longer to reach optimal temperature. Use block heaters and avoid excessive idling.
Summer: High temperatures increase AC load. Park in the shade and vent the car before turning on the AC.
Manual Efficiency Formula
Verify your car's trip computer with this simple manual calculation.
- Fill the tank completely and record your mileage (A).
- At the next fill-up, record the fuel added (L) and the new mileage (B).
Understanding Fuel Efficiency
Actual fuel economy may differ from official ratings due to various real-world factors.
Road Conditions: Traffic jams and frequent stops significantly reduce mileage compared to constant highway speeds.
Weather & Temperature: Engine efficiency drops in cold weather, and high AC usage in summer can reduce it further.
Vehicle Maintenance Tips
- Keep tires properly aligned and balanced to prevent unnecessary drag.
- Replace clogged air filters and spark plugs regularly to optimize combustion.
- Use the recommended grade of motor oil for your specific engine type.
Using Fuel Cost Results for Real Trips
Fuel cost is distance ÷ efficiency × price per liter. Traffic, season, tire pressure, air conditioning and load can shift the real cost by 10–20%.
Worked example: Seoul to Busan, about 400 km one way
- A car rated at 13 km/L needs 400 ÷ 13 ≈ 30.8 L
- At 1,856 KRW per liter (October 2026 national average reference), 30.8 × 1,856 ≈ 57,100 KRW
- A round trip is about 114,200 KRW, plus highway tolls.
A 10 km/L car would spend about 74,200 KRW on the same trip. When sharing costs, include tolls and parking too.
Before you rely on the result
- Include the return trip and stopovers.
- Use your real fuel economy when you know it.
- Consider the mix of city and highway driving.
- Fuel prices vary by region, station and date. Actual receipts are best for settling up.
Frequently asked questions
Why does real efficiency differ from official figures?
Official figures use standard test conditions. Real roads add speed, congestion, load and weather.
National Average Fuel Price
Last Updated: -
These are dated reference estimates, not live nationwide prices.
Data note: Reference values based on public Opinet information