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Fuel Economy Conversion Table
Values shown for 1 Kilometer per Liter
About Fuel Economy Conversions
Two regions measure fuel economy in opposite directions. The US uses miles per gallon, where higher is better; most of Europe uses liters per 100 kilometers, where lower is better. That inversion is what makes the mental math hard: 30 US MPG works out to about 7.84 L/100km, and 5 L/100km comes to about 47 MPG. The gallon adds a second trap, since a UK gallon is larger than a US one, so the same car rates about 20% higher in UK MPG. All three standards convert on exact factors below.
| Unit Name | Symbol | Value | Formula |
|---|---|---|---|
| Kilometer per Liter | km/L | 1 | base unit |
| Liter per 100km | L/100km | 100 | divide 100 by value |
| Mile per Gallon (UK) | mpg (UK) | 2.82481 | multiply by 0.354006 |
| Mile per Gallon (US) | mpg | 2.35214 | multiply by 0.425144 |