Automotive
Fuel economy
Calculate measured fuel consumption from a completed trip.
Calculators / Automotive / Fuel economy unit converter
Fuel economy unit converter calculator
Convert consumption and economy while keeping US and Imperial gallons distinct.
On this page
Consumption7L/100 km
Economy14.29km/L
US fuel economy33.6MPG US
Imperial fuel economy40.35MPG UK
Calculator controls
How to calculate
Convert consumption and economy while keeping US and Imperial gallons distinct.
MPG US = 235.2145833333333 ÷ L/100 km; MPG UK = 282.4809363318222 ÷ L/100 km; km/L = 100 ÷ L/100 km.
Worked example
Fuel economy: 7; Input unit: 0.
Consumption: 7 L/100 km; Economy: 14.29 km/L; US fuel economy: 33.6 MPG US; Imperial fuel economy: 40.35 MPG UK.
Assumptions and limits
Convert consumption and economy while keeping US and Imperial gallons distinct. This is reciprocal, not a linear multiplier; zero consumption cannot be converted to a finite MPG value.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Convert consumption and economy while keeping US and Imperial gallons distinct. This is reciprocal, not a linear multiplier; zero consumption cannot be converted to a finite MPG value.
When this tool is useful
MPG US = 235.2145833333333 ÷ L/100 km; MPG UK = 282.4809363318222 ÷ L/100 km; km/L = 100 ÷ L/100 km.
Understanding your inputs
| Input | What to enter |
|---|---|
| Fuel economy | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Input unit | Enter one of the available options. |
Frequently asked questions
Why do US MPG and UK MPG differ?
An Imperial gallon is larger than a US gallon. For the same fuel use in litres per 100 kilometres, UK MPG is higher; select the gallon definition used by the source you are comparing.