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How to use Fuel Economy Converter

Type a value in any field. The tool converts through L/100 km using each inverse factor to fill US MPG, UK MPG and km/L.

Frequently asked questions

How does L/100 km relate to US MPG?

MPG(US) = 235.214583 ÷ (L/100 km); the two scales are inversely related.

Why do US and UK MPG differ?

The imperial gallon is larger, so UK MPG = 282.480936 ÷ (L/100 km) gives higher numbers than US MPG.

Is a lower L/100 km better?

Yes — fewer litres per 100 km means better efficiency, unlike MPG where higher is better.

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