Fuel economy units

Enter either MPG or L/100 km; the other field updates on Calculate. The relationship is standard algebra from distance and volume definitions. Driving style, temperature, and test cycles mean real-world consumption will differ from any single number.

Uses 235.214583 ÷ MPG = L/100km (US gallon definition).

FAQ

Which MPG is used?

US statute miles per US liquid gallon, paired with liters per 100 km using the standard algebraic conversion.

Imperial MPG

UK imperial gallons differ; this tool does not switch to imperial MPG automatically.

Why L/100 km?

Common in many countries; lower numbers mean more efficient in that unit.

Real-world economy

Driving style, temperature, maintenance, and test cycles change results vs any single sticker number.

Electric vehicles

Not modeled here (MPGe is a different convention).

Privacy

Runs locally in your browser.