How to use this converter

Enter fuel economy, from, to.
Select Calculate to view the result.
Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

Input	Format and units	Sample
Fuel economy	Numeric value. Must be greater than zero.	`8`
From	Choose L/100km / km/L / US mpg / Imperial mpg.	`L/100km`
To	Choose L/100km / km/L / US mpg / Imperial mpg.	`US mpg`

Result for these sample inputs

29.4018229 US mpg

Consumption (L/100 km): 8

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

L/100 km = 100 ÷ km/L. US mpg = 235.214583333… ÷ L/100 km. Imperial mpg uses 282.480936331… instead.

A WORKED EXAMPLE

8 L/100 km equals 12.5 km/L and about 29.40 US mpg.

What to keep in mind

Consumption and distance-per-fuel are reciprocal measures. Zero values are rejected. US and imperial gallons differ; no driving conditions are modeled.

Common questions

Does a higher value mean better efficiency?

For mpg or km/L, yes. For L/100 km, lower values mean less fuel consumed per distance.

Why are imperial mpg values higher?

An imperial gallon contains more fuel than a US liquid gallon, so the same vehicle travels farther per gallon.

Methodology maintained by ClarityKit. How these tools are built and checked.

Fuel Economy Converter

Choose units and a value