MPG (US) to Liters per 100 km Converter (mpg to L/100 km)
Type a value in miles per US gallon to see it in liters per 100 km instantly.
30 mpg = 7.84049 L/100 km
Formula: L/100 km = 235.215 ÷ mpg (US)
How to convert miles per US gallon to liters per 100 km
Divide 235.215 by the mpg figure. The same formula works in reverse.
L/100 km = 235.215 ÷ mpg (US)
Example: 235.215 ÷ 30 mpg = 7.84049 L/100 km
Because one scale measures distance per fuel and the other fuel per distance, the relationship is inverse: doubling mpg halves L/100 km. For UK (imperial) mpg, divide 282.481 by the mpg figure instead.
mpg to L/100 km conversion table
| MPG (US) (mpg) | Liters per 100 km (L/100 km) |
|---|---|
| 10 mpg | 23.5215 L/100 km |
| 15 mpg | 15.681 L/100 km |
| 20 mpg | 11.7607 L/100 km |
| 25 mpg | 9.40858 L/100 km |
| 30 mpg | 7.84049 L/100 km |
| 35 mpg | 6.72042 L/100 km |
| 40 mpg | 5.88036 L/100 km |
| 45 mpg | 5.22699 L/100 km |
| 50 mpg | 4.70429 L/100 km |
| 55 mpg | 4.27663 L/100 km |
| 60 mpg | 3.92024 L/100 km |
| 70 mpg | 3.36021 L/100 km |
| 100 mpg | 2.35215 L/100 km |
About the units
Mile per US gallon (mpg)
Miles per gallon measures how far a vehicle travels on one US gallon of fuel. Higher is better. UK mpg uses the larger imperial gallon, so UK figures are about 20% higher for the same car.
Liter per 100 km (L/100 km)
Liters per 100 kilometers measures how much fuel is used to cover 100 km. Lower is better. It is the standard in Europe, Australia and most of Asia.
Frequently asked questions
How do I convert miles per US gallon to liters per 100 km?
Use the formula L/100 km = 235.215 ÷ mpg (US). Divide 235.215 by the mpg figure. The same formula works in reverse. For example, 235.215 ÷ 30 mpg = 7.84049 L/100 km.
Is 30 mpg good?
30 US mpg is 7.84 L/100 km — about average for a modern mid-size petrol car.
Why can’t I just multiply?
mpg is distance per volume while L/100 km is volume per distance, so one is the reciprocal of the other. That is why the formula divides a constant by the value.
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Background reading: Metric vs. Imperial.