Fuel Economy Converter
About Fuel Economy Converter
What Is a Fuel Economy Converter?
A fuel economy converter transforms vehicle fuel efficiency measurements between different standards used around the world. The US uses miles per gallon (MPG), most of Europe and many other countries use liters per 100 kilometers (L/100km), and some Asian countries use kilometers per liter (km/L). Understanding these conversions is essential for comparing vehicles across markets and understanding fuel costs when traveling internationally.
Conversion Formulas
The conversions are: US MPG to L/100km: 235.215 / MPG. L/100km to US MPG: 235.215 / L/100km. km/L to L/100km: 100 / km/L. Note that MPG and km/L are inverse measures (higher is better) while L/100km is a consumption measure (lower is better). UK MPG differs from US MPG because the UK gallon is larger.
How to Use This Converter
Enter a fuel economy value, select the source unit, and click Convert to see all equivalent values. The converter distinguishes between US MPG and UK MPG.
Frequently Asked Questions
What is good fuel economy?
For gasoline cars, 30+ US MPG (7.8 L/100km) is good. Hybrids can achieve 50+ MPG. Electric vehicles are measured in MPGe (miles per gallon equivalent).
Why is UK MPG different from US MPG?
The UK gallon is 4.546 liters while the US gallon is 3.785 liters. So a car rated at 30 US MPG would be about 36 UK MPG for the same fuel consumption.
Why does Europe use L/100km instead of MPG?
L/100km is a consumption metric that directly shows fuel cost per distance. It also scales linearly: saving 1 L/100km always saves the same amount of fuel regardless of starting point.
