Convert fuel consumption between metric, US, and imperial conventions.
Result
1 L/100 km = 235.214583 mpg (US)
1 L/100 km in every supported unit.
| Unit | Value |
|---|---|
| Litres per 100 kilometresL/100 km | 1 |
| Kilometres per litrekm/L | 100 |
| Miles per US gallonmpg (US) | 235.214583 |
| Miles per imperial gallonmpg (imp) | 282.480936 |
Complete tool guide
The Fuel Economy Converter is a free online conversion tool for translating a fuel economy value from one measurement unit into another. Convert fuel consumption between metric, US, and imperial conventions. Enter a number once to see the selected result and a comparison table covering every supported unit.
Unit conversion is useful whenever a specification, recipe, report, product label, instrument, dataset, or instruction uses a measurement system different from the one you need. The converter applies the defined mathematical relationship consistently and avoids the common mistakes caused by moving decimal points or relying on a remembered approximate factor.
Enter the source number exactly as supplied, including any required decimal precision.
Choose the original unit in the From field and verify its symbol; similarly named units can represent different quantities.
Choose the required destination unit in the To field and read the live result. Use Swap when you need the reverse relationship.
Review the all-conversions table, then copy the labeled result and retain the source value for traceability.
Fuel consumption in L/100 km is reciprocal to distance-per-volume economy. The converter uses separate constants for US and imperial gallons because their volumes differ.
L/100 km is a consumption measure, so its relationship with distance-per-volume units is reciprocal rather than linear.
This converter supports Litres per 100 kilometres (L/100 km), Kilometres per litre (km/L), Miles per US gallon (mpg (US)), Miles per imperial gallon (mpg (imp)).
Lower L/100 km means less fuel used, while higher km/L or MPG means greater distance per unit of fuel. The direction of “better” therefore reverses between conventions.
Real fuel economy changes with route, weather, load, driving style, fuel blend, vehicle condition, and measurement method. US MPG and imperial MPG are not interchangeable.
Displayed values are rounded for readability. A converted number cannot be more accurate than the source measurement, so do not treat extra decimal places as additional instrument precision.
Convert fuel consumption between metric, US, and imperial conventions. Supported choices are Litres per 100 kilometres (L/100 km), Kilometres per litre (km/L), Miles per US gallon (mpg (US)), Miles per imperial gallon (mpg (imp)). Select the unit attached to the source value and the unit required for the result.
The calculator uses the factors and formulas described above and retains precision internally. The practical accuracy still depends on the source measurement, correct unit selection, displayed rounding, and whether the context uses the same unit definition.
Check for a rounded factor, a different regional unit, an incorrect source unit, or a distinction such as decimal versus binary, US versus imperial, gauge versus absolute, or mass versus volume. Compare the complete unit name and method.
Only some metric-prefix conversions work that way. Imperial relationships, offset temperature scales, reciprocal fuel economy, area, volume, and many cross-system conversions require specific formulas. Use the defined converter rather than assuming a power of ten.
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