20.50 L/100km to MPG (US)
11.5 mpg
20.50 L/100km = 11.5 mpg.
MPG (US)
11.5mpg
20.5 L/100km = 11.5 mpg
The short answer
How many MPG (US) is 20.50 L/100km?
20.50 L/100km = 11.5 mpg. MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 20.50 = 11.5.
The working
L/100km and MPG (US) are reciprocals of each other, so the conversion is a division rather than a multiplication — which is why the two scales never line up evenly.
MPG (US) = 235.214583 ÷ L/100km 235.214583 ÷ 20.50 = 11.5
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (mpg) | Off by |
|---|---|---|
| Whole number | 11 | −0.47388 |
| 1 decimal | 11.5 | +0.02612 |
| 2 decimals | 11.47 | −0.00388 |
Round trip: take 11.5 mpg back the other way and you land on 20.4534 L/100km — a drift of 0.0466 L/100km. That gap is the rounding, not the conversion.
What 20.50 L/100km looks like
21.50 L/100km
A Bugatti Chiron, EPA rated at 11 mpg combined, amounts to roughly 21.4 litres of fuel per 100 kilometres.
Frequently asked questions
What is 20.50 L/100km in MPG (US)?
20.50 L/100km is 11.5 MPG (US). MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 20.50 = 11.5.
How accurate is 11.5 mpg?
Rounding to 11.5 mpg and converting straight back gives 20.4534 L/100km, a drift of 0.0466 L/100km from the 20.50 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
L/100km to MPG Converter
Convert L/100km to US MPG — turn a European economy figure into miles per gallon.
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