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Fuel Economy Converter — All Units with Formulas

Convert between 4 fuel economy units in one place — Kilometers per Liter, Miles per Gallon (US), Miles per Gallon (UK), Liters per 100 km and more. Results update as you type.

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All fuel economy units explained

UnitSymbolValue in Kilometers per LiterDescription
Kilometers per Literkm/L1 km/LKilometers per liter is how mileage is usually quoted in Bangladesh and South Asia.
Miles per Gallon (US)mpg0.425143707 km/LMiles per US gallon is the fuel economy standard in the United States.
Miles per Gallon (UK)mpg UK0.35400619 km/LMiles per imperial gallon is used in the United Kingdom.
Liters per 100 kmL/100km—Liters per 100 km measures consumption (lower is better), used in Europe and Australia.

Popular fuel economy conversions

Each conversion below has its own page with a formula, worked example and table.

When do you need a fuel economy converter?

Fuel economy conversions are used for comparing car and motorcycle mileage, trip fuel costs and imported vehicle specs. Different countries and industries use different units, so a reliable converter prevents costly mistakes.

Frequently asked questions

Which fuel economy units are supported?

Kilometers per Liter (km/L), Miles per Gallon (US) (mpg), Miles per Gallon (UK) (mpg UK), Liters per 100 km (L/100km).

Is the converter free?

Yes, completely free with no limits, and it works offline once loaded.

How accurate are the results?

Conversions use exact standard factors with full double-precision arithmetic.