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Conversion Unit conversion

Fuel Economy Converter

Convert fuel economy across mpg US, mpg UK, L/100km, and km/L.

Conversion

Fuel Economy Converter translates efficiency values across mpg US, mpg UK, L/100km, and km/L so vehicle data from different regions can be compared directly. It is useful when evaluating cars, analyzing fleet consumption, or reading international specs where unit conventions differ. The tool handles reciprocal unit behavior correctly and shows all supported equivalents in one output panel. This helps avoid common manual-conversion mistakes, especially between mpg and L/100km. Use it to normalize efficiency figures before making purchasing or operational decisions.

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Input guidance

Enter the source value, select source and target units where available, then review conversion factors and displayed rounding before copying the result.

How to use this tool

Enter fuel economy value and choose the source unit.
Select target unit and click `Convert`.
Use the all-units table to compare efficiency across regional standards.

Fuel Economy Converter

Result

30 Miles per Gallon (US) = 7.840486 Liters per 100 km (L/100km)

All Units

Miles per Gallon (US)30

Miles per Gallon (UK)36.028498

Liters per 100 km (L/100km)7.840486

Kilometers per Liter (km/L)12.754311

Formula or method

Applies fixed conversion factors between the supported source and target units, then rounds displayed values for readability.

How to interpret the result

30 Miles per Gallon (US) converts to 7.84 Liters per 100 km (L/100km) using the selected fuel-economy convention.
Fuel economy units invert differently: lower L/100 km is more efficient, while higher mpg or km/L is more efficient.
Displayed values are rounded for readability; keep the source unit with the converted value.

Review note and limitations

Converted values depend on the selected units, conversion factors, and displayed rounding.
Some domains use conventions or reference conditions that may differ from a simple unit conversion.

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