How to use this tool
Choose the unit of the entered positive value. Litres per 100 kilometres measures consumption, while miles per gallon measures distance per fuel volume, so their relationship is reciprocal. US and imperial gallons are different volumes. The tool converts units only; it does not predict fuel use for a route.
Try these values
About 7.84 L/100 km corresponds to 30 US mpg. The imperial mpg figure is larger because an imperial gallon contains more fuel.
Common questions
Which direction is more efficient?
Higher mpg indicates more distance per gallon; lower L/100 km indicates less fuel consumed per distance.
Are US and UK mpg interchangeable?
No. Their gallons have different volumes.
Something doesn’t add up? Report an issue · Methods & corrections