How this calculator works
Liters per 100 km measures fuel used per distance, so a smaller number is better. km/L and MPG measure distance per fuel, so a larger number is better. US and Imperial gallons are different sizes; select the correct one.
The formula
km/L = 100 / (L/100 km). US mpg = 235.214583333333 / (L/100 km). Imperial mpg = 282.480936331822 / (L/100 km).A quick example
8 L/100 km equals 12.5 km/L, approximately 29.4018 US mpg or 35.3101 Imperial mpg.
How to use this calculator
- Choose the settings that match your scenario, using the units shown beside each field.
- Enter value, from, to.
- Calculate, then review the method and assumptions alongside the results.
A few common questions
Why can I not convert zero consumption?
Reciprocal efficiency would be infinite. This tool accepts strictly positive finite values.
Which MPG should I select?
Choose the gallon convention used by the source: US and Imperial MPG are not interchangeable.
Reference: NIST: SI conversion factors