Global Fuel CalculatorMPG to L/100km Converter
Convert any MPG figure into L/100km, with separate results for US and imperial gallons because the two produce meaningfully different answers — roughly a twenty percent gap for the same real consumption. Enter your value once and see it converted precisely rather than rounded to a rough rule of thumb.
The two scales run in opposite directions: MPG rewards a higher number, L/100km rewards a lower one. A specification sheet quoting one and a review quoting the other cannot be compared by eye, which is exactly the gap this converter closes.
MPG to L/100km Converter
Common questions
How do I convert MPG to L/100 by hand?
For a US gallon figure, divide 235.214 by the MPG value. For an imperial gallon figure, divide 282.481 by it. Thirty US MPG works out to about 7.84 L/100km; thirty imperial MPG works out to about 9.42 L/100km — noticeably different despite the same starting number.
How much is 40 MPG in km/l?
Convert MPG to L/100km first using the formula above, then take 100 divided by that L/100km figure to reach km/L. Forty US MPG is about 5.88 L/100km, which is roughly 17 km/L.
How much is 1 MPG in liters?
One MPG on its own is not a volume — it is distance per gallon. What is usually meant is "what does 1 MPG correspond to in L/100km", which is 235.214 L/100km for a US gallon: an extremely poor, very high consumption figure, since MPG and L/100km are reciprocal scales.
What is 12 litres per 100 km in MPG?
Divide 235.214 by 12 for US MPG, which gives roughly 19.6 MPG, or divide 282.481 by 12 for imperial MPG, giving roughly 23.5 MPG. Enter 12 directly into the L/100km to MPG converter on this site for the exact figure without doing the division yourself.
Is a UK MPG the same as a US MPG in this converter?
No, and the converter treats them separately for exactly that reason. Select imperial when your MPG figure comes from a UK source and US when it comes from an American one — mixing the two silently produces a result that is about twenty percent off.