Fuel Economy Converter (km/L, L/100 km, mpg)

Fuel Economy Converter turns a car’s fuel figure from one country’s way of stating it into another’s. India and much of Asia quote mileage in kilometres per litre; Europe, Australia and Canada in litres per 100 kilometres; the United States in miles per US gallon; and the United Kingdom in miles per imperial gallon, which is a bigger gallon, so the same car shows a higher mpg there. These are not simple multiples of one another: litres per 100 km is the reciprocal of kilometres per litre, so a higher number means a thirstier car. The converter works through kilometres per litre with exact unit definitions — a mile is 1.609344 km, a US gallon 3.785411784 L, a UK gallon 4.54609 L — so 20 km/L is exactly 5 L/100 km.

1. Type the figure.
2. Choose the unit it is in and the unit you want, or press a common conversion.
3. Read the answer and the figure in every other unit.

• Official figures come from standard test cycles (ARAI in India, WLTP in Europe, EPA in the US) that differ from each other and from real driving; converting the unit does not convert the test.
• Zero and negative figures are refused: they would mean no distance or no fuel.
• Electric car efficiency (kWh per 100 km, miles per kWh) is a different quantity and is not included.
• Because the scales are reciprocal, averaging two cars’ km/L figures is not the same as averaging their L/100 km figures.
• Everything is worked out in your browser and nothing is sent.

About 5.56 L/100 km (100 ÷ 18). The page opens with this example.

An imperial gallon is about 4.55 litres, a US gallon about 3.79, so a car goes further on a UK gallon. 50 mpg (UK) is about 41.6 mpg (US).

Yes: it is fuel used per distance, so lower is more economical. With km/L and mpg, higher is better.

Multiply US mpg by about 0.4251, or UK mpg by about 0.3540. 30 mpg (US) is 12.75 km/L.