Volume
Miles per gallon to liters per 100 km
Two units change at once, so the constant does both: 100 km divided by 1.609344 km per mile, times 3.785411784 liters per gallon. A rating of 30 mpg gives 7.8404861 L/100 km.
The Formula
L/100km = 235.214583 / mpg
Two units change at once, so the constant does both: 100 km divided by 1.609344 km per mile, times 3.785411784 liters per gallon. A rating of 30 mpg gives 7.8404861 L/100 km.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| mpg | Fuel economy in miles per US gallon | miles per gallon | Higher is better. The converted figure moves in the opposite direction. |
| 235.214583 | Combined conversion constant | liter-miles per gallon-100 km | Equals 100 / 1.609344 x 3.785411784, and presumes the US gallon. |
| L/100km | Fuel consumption in liters per 100 km | liters per 100 km | Lower is better, the reverse of the mpg reading. |
What Each Symbol Means
mpgmiles per gallon
Fuel economy in miles per US gallon
Higher is better. The converted figure moves in the opposite direction.
235.214583liter-miles per gallon-100 km
Combined conversion constant
Equals 100 / 1.609344 x 3.785411784, and presumes the US gallon.
L/100kmliters per 100 km
Fuel consumption in liters per 100 km
Lower is better, the reverse of the mpg reading.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert gallons to liters page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Convert Gallons To Liters, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.