Convert fuel consumption and fuel economy units including L/100 km, MPG US, MPG UK, km/L, gallons per mile, and related measures.
Overview
A Fuel Consumption Converter changes fuel-use and fuel-economy values between units. It is slightly different from normal unit conversion because some units measure fuel used per distance, while others measure distance traveled per fuel volume.
That means higher MPG is better, but higher L/100 km means more fuel used. The tool helps translate those values so you can compare vehicles, trip estimates, and data rows more clearly.
Enter the amount, choose the source fuel unit, then choose the target unit. The result updates automatically.
The current Fuel Consumption Converter code uses meter per liter as its base representation. Distance-per-volume units convert proportionally, while reciprocal units such as L/100 km, gallon per mile, and gallon per 100 miles use a constant divided by the value. A zero input returns 0.
The output is formatted with seven significant digits. The swap control reverses the units and uses the current result as the new input.
If a vehicle is rated at 8 L/100 km, L/100 km to MPG gives about 29.4018 MPG (US). If a listing says 30 MPG (US), MPG to L/100 km gives about 7.84049 L/100 km.
If a spec says 12 km/L, km/L to MPG gives about 28.2257 MPG (US). Keep US and UK MPG labels visible because the gallon size changes the result.
These common conversions use the US MPG convention unless the row says UK. Notice that L/100 km and MPG are reciprocal, so the formula divides by the value.
| Popular conversion | Formula | Example |
|---|---|---|
| L/100 km to MPG (US) | 235.214583 / L/100 km | 8 L/100 km = 29.4018 MPG |
| MPG (US) to L/100 km | 235.214583 / MPG | 30 MPG = 7.84049 L/100 km |
| km/L to MPG (US) | km/L x 2.35214583 | 12 km/L = 28.2257 MPG |
| MPG (US) to km/L | MPG x 0.425143707 | 30 MPG = 12.7543 km/L |
| MPG (US) to MPG (UK) | US MPG x 1.20095 | 30 US MPG = 36.0285 UK MPG |
| MPG (UK) to MPG (US) | UK MPG x 0.832674 | 36 UK MPG = 29.9763 US MPG |
| Gallons/100 mi to MPG | 100 / gal per 100 mi | 4 gal/100 mi = 25 MPG |
| L/meter to m/L | 1 / L per meter | 0.002 L/m = 500 m/L |
Fuel economy can be confusing because better efficiency may mean a bigger number or a smaller number depending on the unit.
| Situation | Useful conversions | Why it helps |
|---|---|---|
| Comparing international car specs | L/100 km to MPG, MPG to L/100 km | Europe and many metric markets use L/100 km; US listings often use MPG. |
| Fuel economy spreadsheets | km/L to MPG, MPG to km/L | Imported vehicle data may use kilometers per liter. |
| US and UK references | US MPG to UK MPG, UK MPG to US MPG | US and imperial gallons are different sizes. |
| Trip and cost notes | MPG to L/100 km, L/100 km to MPG | A consistent unit makes fuel estimates easier to compare. |
| Classroom examples | gallons per mile, gallons per 100 miles | Reciprocal units show why formulas are not always simple multiplication. |
| Vehicle research | car fuel consumption converter terms | Buyers can compare ratings from different countries. |
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Fuel Consumption Converter
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