Fuel Economy Converter
Convert between different units of fuel economy including MPG, km/L, and L/100km.
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Conversion Formula
1 mpg (US) ≈ 0.425 km/L
To convert between fuel economy units, convert through the base unit (km/L). For example, to convert mpg (US) to km/L: multiply the mpg value by 0.425144. Note that L/100km is an inverse measure — higher km/L means better fuel economy, but lower L/100km means better fuel economy.
Frequently Asked Questions
How do I convert MPG (US) to km/L?
Multiply the MPG (US) value by 0.425144. For example, 30 mpg (US) = 30 × 0.425144 = 12.75 km/L.
What is the difference between MPG (US) and MPG (UK)?
The US gallon is 3.78541 liters while the UK (imperial) gallon is 4.54609 liters. This means MPG (UK) values are approximately 20% higher than MPG (US) for the same fuel efficiency.