ConverterMPG to L/100km Converter
Convert a US-MPG fuel-economy figure into metric fuel consumption.
Identify The US-Gallon MPG Input
MPG means miles per US liquid gallon on these two established routes; Imperial MPG uses a different gallon.
A bare MPG value can instead mean Imperial MPG; this page uses the US gallon.
Convert Distance Per Fuel Into Fuel Per Distance
The reciprocal factor is derived from exactly 3.785411784 L per US gallon and exactly 1.609344 km per international mile; its decimal expansion is approximately 235.2145833333.
30 mpg (US) becomes approximately 7.8404861111 L/100 km.
Undefined Zero And Signed Arithmetic
Zero has no reciprocal result. A negative value remains calculable under the established numeric grammar but does not describe ordinary vehicle fuel consumption.
Learn More About This Topic
Use the supporting references when the assumptions behind MPG to L/100km matter as much as the immediate result. For more context, read why fuel-economy systems look reversed before using the result in a real workflow.
Frequently Asked Questions
The measures run in reciprocal directions: US MPG is distance per fuel amount, while L/100 km is fuel per fixed distance.
The reciprocal is undefined, so the page displays an explanatory message and no Infinity, NaN, or finite-looking result.
No. The mile and US-gallon definitions are exact, but the reciprocal quotient repeats; the displayed value is formatted after calculation.
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