Calculate your vehicle's fuel efficiency using distance driven and fuel consumed. Check km/L, L/100km, and cost per km instantly, and compare with average efficiency by vehicle type.
'Calculate Efficiency' mode computes actual fuel efficiency from distance and fuel used. 'Trip Cost Calculator' mode estimates fuel needed and cost for a trip based on your car's efficiency.
For efficiency calculation: enter total distance driven (km), fuel consumed (L), and fuel price (KRW/L). For trip cost: enter trip distance, your car's average efficiency, and current fuel price.
If you don't know the fuel price, click the quick preset buttons. Average 2024 prices are auto-filled: Gasoline ~1,650 KRW/L, Diesel ~1,500 KRW/L, LPG ~950 KRW/L.
Click Calculate to see km/L, L/100km, and cost per km. The comparison table shows how your car compares to average efficiency of sedans, SUVs, compact cars, and more.
The Fuel Efficiency Calculator is a free tool that computes your actual fuel efficiency (km/L) from distance driven and fuel consumed. Fuel efficiency indicates how many kilometers you can drive per liter of fuel, serving as the most fundamental measure of vehicle fuel economy.
Reset your trip meter after refueling, record distance and fuel amount at next refuel to calculate actual efficiency. Compare with manufacturer's rated efficiency to check vehicle condition.
For a 400km Seoul-to-Busan trip with 12km/L efficiency and 1,650 KRW/L gasoline, total fuel cost is about 55,000 KRW. Use this for trip budget planning.
Compare LPG (10km/L, 950 KRW/L) vs gasoline (12km/L, 1,650 KRW/L) vehicles. LPG is more economical for the same distance despite lower efficiency.
When buying a new car, compare efficiency across models to calculate annual fuel costs and evaluate total cost of ownership (TCO).
| Vehicle Type | Average Efficiency (km/L) | Notes |
|---|---|---|
| Compact | 16 | Morning, Spark, etc. |
| Compact Sedan | 14 | Avante, K3, etc. |
| Mid-size Sedan | 12 | Sonata, K5, etc. |
| Compact SUV | 13 | Kona, Seltos, etc. |
| Mid-size SUV | 11 | Tucson, Sportage, etc. |
| Large SUV | 9 | Palisade, Mohave, etc. |
| Hybrid | 20 | Ioniq, Niro HEV, etc. |
km/L shows kilometers per liter (higher is better), commonly used in Korea. L/100km shows liters needed per 100km (lower is better), used as the international standard. For example, 12km/L equals about 8.3L/100km.
Rated efficiency is measured under standardized lab conditions. Real-world driving is affected by traffic, driving habits, A/C use, cargo weight, and tire pressure. Actual efficiency is typically 10-30% lower than rated.
Use the 'full-to-full' method: fill up completely, reset trip meter, drive until next fill-up, fill up again and note the fuel amount. Distance / Fuel = actual efficiency. Repeat 3-4 times for accuracy.
Hybrid vehicles use the same calculation: distance / fuel consumed. However, efficiency varies more by driving pattern since hybrids use both electric motor and engine.
Yes, significantly. Summer A/C use reduces efficiency 10-20%. Winter heating and cold temperatures can reduce it 15-30%. Spring and fall provide the best efficiency.
Diesel vehicles are typically 20-30% more efficient than gasoline. Diesel engines have higher compression ratios and thermal efficiency. Combined with lower diesel prices, fuel cost savings are significant.
Check: (1) tire pressure, (2) air filter, (3) spark plugs, (4) oxygen sensor, (5) brake pads, (6) engine oil. Visit a mechanic for diagnosis.