17 MPG (US) to L/100km
13.8 L/100km
17 mpg = 13.8 L/100km.
L/100km
13.8L/100km
17 mpg = 13.8 L/100km
The short answer
How many L/100km is 17 MPG (US)?
17 mpg = 13.8 L/100km. L/100km = 235.214583 ÷ MPG (US), so the working is 235.214583 ÷ 17 = 13.8.
The working
MPG (US) and L/100km 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.
L/100km = 235.214583 ÷ MPG (US) 235.214583 ÷ 17 = 13.8
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 (L/100km) | Off by |
|---|---|---|
| Whole number | 14 | +0.16385 |
| 1 decimal | 13.8 | −0.03615 |
| 2 decimals | 13.84 | +0.00385 |
Round trip: take 13.8 L/100km back the other way and you land on 17.0445 mpg — a drift of 0.0445 mpg. That gap is the rounding, not the conversion.
What 17 mpg looks like
18 mpg
The first US CAFE standard, for model year 1978 passenger cars, was set at a fleet average of 18.0 mpg.
Frequently asked questions
What is 17 MPG (US) in L/100km?
17 MPG (US) is 13.8 L/100km. L/100km = 235.214583 ÷ MPG (US), so the working is 235.214583 ÷ 17 = 13.8.
How accurate is 13.8 L/100km?
Rounding to 13.8 L/100km and converting straight back gives 17.0445 mpg, a drift of 0.0445 mpg from the 17 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
MPG to L/100km Converter
Convert US MPG to L/100km — read a car’s economy the way the rest of the world quotes it.
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