15 L/100km to MPG (US)
15.7 mpg
15 L/100km = 15.7 mpg.
MPG (US)
15.7mpg
15 L/100km = 15.7 mpg
The short answer
How many MPG (US) is 15 L/100km?
15 L/100km = 15.7 mpg. MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 15 = 15.7.
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 ÷ 15 = 15.7
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 | 16 | +0.31903 |
| 1 decimal | 15.7 | +0.01903 |
| 2 decimals | 15.68 | −0.00097 |
Round trip: take 15.7 mpg back the other way and you land on 14.9818 L/100km — a drift of 0.0182 L/100km. That gap is the rounding, not the conversion.
What 15 L/100km looks like
15.50 L/100km
Near 15.3 the scales agree, so a car burning 15.3 L/100km is also doing 15.3 US miles per gallon.
Frequently asked questions
What is 15 L/100km in MPG (US)?
15 L/100km is 15.7 MPG (US). MPG (US) = 235.214583 ÷ L/100km, so the working is 235.214583 ÷ 15 = 15.7.
How accurate is 15.7 mpg?
Rounding to 15.7 mpg and converting straight back gives 14.9818 L/100km, a drift of 0.0182 L/100km from the 15 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.
Open the l/100km to mpg converter →