Fuel Consumption Converter
Convert fuel economy between MPG (US and imperial), litres per 100 km, and km per litre.
Litres per 100 km
7.84
Breakdown
- Kilometres per litre
- 12.75
- MPG (US)
- 30
- MPG (imperial)
- 36.03
- Fuel for trip (litres)
- 0
- Trip fuel cost
- 0
Last updated:
FAQ
Why are US and imperial MPG different?
The gallon itself differs: a US gallon is 3.785 L while an imperial gallon is 4.546 L. The same car shows a bigger MPG number in the UK purely from the bigger unit — 40 imperial MPG is only about 33 US MPG.
How do I convert MPG to L/100 km?
Divide 235.215 by the US MPG figure (282.481 for imperial). It is a reciprocal relationship, so improving from 20 to 25 MPG saves far more fuel per mile than going from 40 to 45 — L/100 km makes that obvious.
Which unit is 'better'?
L/100 km is fuel per fixed distance, so consumption adds up linearly and comparisons are honest. MPG rewards already-efficient cars in misleading ways — which is why most of the world, and now plug-in hybrid ratings, use litres (or kWh) per distance.
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