Fuel efficiency including reciprocal liters-per-100-km units.
All factors come from the central conversion registry.
| Unit | Symbol | System | Definition |
|---|---|---|---|
| Kilometers per Liter | km/L | Metric | 1 km/L = 1 km/L |
| Liters per 100 Kilometers | L/100 km | Metric | km/L = 100 ÷ (L/100 km) |
| US Miles per Gallon | US mpg | US customary | 1 US mpg ≈ 0.4251437075 km/L |
| Imperial Miles per Gallon | Imp mpg | Imperial | 1 Imp mpg ≈ 0.3540061899 km/L |
Fuel-economy units can be reciprocal rather than linear. Converting L/100 km to miles per gallon therefore requires an inverse relationship, not just a fixed multiplier.
The interactive calculator, reference table and indexed pair pages all read from the same conversion registry, so unit definitions and formulas stay synchronized.