Convert mpg to L/100km
Miles per US gallon to liters per 100 kilometers. Enter a value to convert, or use the mpg to L/100km chart further down the page.
1 mile per US gallon equals 235.2145833 liters per 100 kilometers. Going the other way, 1 liter per 100 kilometers = 235.2145833 miles per US gallon.
Note. L/100km is an inverse measure — a lower number means better economy — so converting to or from it uses a reciprocal, not a multiplication.
How to convert mpg to L/100km
Miles per US gallon and liters per 100 kilometers are inversely related — as one goes up the other goes down. Divide 235.2145833 by the mile per US gallon value to convert.
L/100km = 235.2145833 ÷ MPG (US)
Worked example
Convert 30 MPG (US) to liters per 100 kilometers:
30 MPG (US) = 7.840486111 L/100km
mpg to L/100km conversion chart
Use this mpg to L/100km table for quick reference without typing anything.
| miles per US gallon (MPG (US)) | liters per 100 kilometers (L/100km) |
|---|---|
| 5 MPG (US) | 47.04291667 L/100km |
| 10 MPG (US) | 23.52145833 L/100km |
| 15 MPG (US) | 15.68097222 L/100km |
| 20 MPG (US) | 11.76072917 L/100km |
| 25 MPG (US) | 9.408583333 L/100km |
| 30 MPG (US) | 7.840486111 L/100km |
| 35 MPG (US) | 6.720416667 L/100km |
| 40 MPG (US) | 5.880364583 L/100km |
| 50 MPG (US) | 4.704291667 L/100km |
| 60 MPG (US) | 3.920243056 L/100km |
What is a mile per US gallon?
Miles per US gallon is the fuel economy figure used on American window stickers. A US gallon is smaller than an imperial gallon, so US MPG figures are about 17% lower than UK MPG for the same car.
What is a liter per 100 kilometers?
Liters per 100 kilometers is the standard fuel consumption figure in Europe and Canada. Unlike MPG, lower is better.
Frequently asked questions
How do you convert MPG to L/100km?
Divide 235.2145833 by the US MPG figure. For example, 30 mpg becomes 235.2145833 ÷ 30 = 7.84 L/100km. The relationship is inverse, so a higher MPG gives a lower L/100km.
Why is UK MPG higher than US MPG for the same car?
The imperial gallon is 4.54609 litres against the US gallon’s 3.785 litres. A larger gallon travels further, so the same car scores about 20% higher in UK MPG.
Related fuel economy conversions
Convert mpg to other units
Convert other units to L/100km
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