km/L to L/100km
L/100km = 100 / kmPerLiter
Fuel Efficiency Calculator
Mileage & Cost Estimator
Real Fuel Economy
Enter distance driven and fuel used to calculate actual fuel economy.
Fuel Economy
12.00 km/L
Unit Converter
Edit any field to auto-update the other two.
Annual Fuel Cost
Enter annual mileage, fuel economy, and price per liter.
Annual Fuel Cost
₩2,125,000
Monthly Avg Cost
₩177,083
Fuel Economy Reference
| Fuel Type | Avg Economy | Price/L |
|---|---|---|
| Gasoline | 12 km/L | 1,650원 |
| Diesel | 15 km/L | 1,550원 |
| LPG | 10 km/L | 950원 |
| Hybrid | 20 km/L | 1,650원 |
| Electric | 6 km/kWh | 180원/kWh |
Fuel economy units mix higher-is-better and lower-is-better values
km/L and MPG increase as efficiency improves, while L/100km gets smaller as efficiency improves. This converter keeps the units side by side so vehicle comparisons are less confusing.
Conversion formulas
L/100km to km/L
kmPerLiter = 100 / litersPer100km
MPG conversion
US MPG ≈ km/L × 2.352
How to use
- Choose the unit your fuel economy value is currently in.
- Enter the number and review the converted values instantly.
- When comparing vehicles, make sure the unit and test conditions match.
Frequently asked questions
Why is lower better for L/100km?
It measures fuel used to drive 100 km, so a lower number means less fuel for the same distance.
Are US MPG and UK MPG the same?
No. The gallon size differs. This page treats MPG as US MPG unless otherwise stated.
Why does real fuel economy differ from official figures?
Speed, roads, weather, tires, maintenance, load, and driving style can all change real-world results.
This tool is for unit conversion and comparison. For official economy, purchase decisions, or cost planning, check manufacturer and government data plus real driving conditions.