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Fuel economy converter

Convert fuel economy between litres per 100 kilometres, US miles per gallon and imperial miles per gallon.

Example: 7.5 L/100 km is about 31.36 US mpg and 37.66 imperial mpg.

Both dots and commas are accepted as decimal separators.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated

Convert fuel economy

Formula: US mpg = 235.214583 ÷ (L/100 km); imperial mpg = 282.480936 ÷ (L/100 km)

Example: 7.5 L/100 km is about 31.36 US mpg and 37.66 imperial mpg.

consumption
Fuel economy
unit
Input unit

US and imperial gallons differ. Results use fixed mile and gallon conversion factors and are displayed to six decimal places.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript
const litersPer100Km = 6;
console.log(235.214583 / litersPer100Km); // 39.20 US mpg
TypeScript
const litersPer100Km = 6;
const usMpg: number = 235.214583 / litersPer100Km;
console.log(usMpg); // 39.20
Python
print(235.214583 / 6)  # 39.2024 US mpg
Java
System.out.println(235.214583 / 6); // 39.2024 US mpg
C#
Console.WriteLine(235.214583 / 6); // 39.2024 US mpg