18.50 L/100km to MPG (US)
12.7 mpg
18.50 L/100km = 12.7 mpg.
MPG (US)
12.7mpg
18.5 L/100km = 12.7 mpg
The short answer
How many MPG (US) is 18.50 L/100km?
18.50 L/100km = 12.7 mpg. MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 18.50 = 12.7.
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 ÷ 18.50 = 12.7
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 | 13 | +0.28570 |
| 1 decimal | 12.7 | −0.01430 |
| 2 decimals | 12.71 | −0.00430 |
Round trip: take 12.7 mpg back the other way and you land on 18.5208 L/100km — a drift of 0.0208 L/100km. That gap is the rounding, not the conversion.
What 18.50 L/100km looks like
19 L/100km
The top band of the US gas guzzler tax, 7,700 dollars, applies at 12.5 mpg or worse, close to 18.8 L/100km.
Frequently asked questions
What is 18.50 L/100km in MPG (US)?
18.50 L/100km is 12.7 MPG (US). MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 18.50 = 12.7.
How accurate is 12.7 mpg?
Rounding to 12.7 mpg and converting straight back gives 18.5208 L/100km, a drift of 0.0208 L/100km from the 18.50 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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