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Fuel Economy
Convert fuel efficiency between US MPG, liters per 100 km, km per liter and UK MPG. Compare cars advertised in different regions on equal footing.
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💡 Good to know: MPG and litres-per-100km are inverses: higher MPG is better, but lower L/100km is better — easy to mix up.
Worked example
L/100km: 7.840486 · km/L: 12.754311 · MPG (UK): 36.0285
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Inputs
- MPG (US)
30
Frequently asked
Is 30 MPG good?
30 US MPG is about 7.84 L/100km — decent for a gas car, modest for a hybrid.
Why does UK MPG differ?
The imperial gallon is larger than the US gallon, so UK MPG numbers run higher for the same car.