17.1051
10.6286
km/L
17.1051
10.6286
km/L
The Fuel Economy Converter is a comprehensive tool for converting between all major fuel efficiency units used worldwide. Whether you encounter miles per gallon (US or Imperial), liters per 100 kilometers, kilometers per liter, or miles per liter, this converter handles every combination accurately.
Fuel economy measurement varies dramatically by region. In the United States, vehicles are rated in MPG (miles per US gallon) — higher is better. In Europe, Australia, and most of the world, the standard is L/100 km (liters per 100 kilometers) — lower is better. In Japan and parts of Asia, km/L is common. The United Kingdom uses imperial MPG, which is about 20% higher than US MPG due to the larger imperial gallon.
This variety creates confusion when comparing vehicles across markets. A car rated at 35 MPG (US) sounds modest, but it equals 6.72 L/100 km, which is considered quite efficient in Europe. Conversely, a European car rated at 4.5 L/100 km achieves an impressive 52.3 MPG (US). Our converter eliminates this confusion by supporting all major systems.
Note that L/100 km is an inverse scale compared to MPG and km/L: as fuel efficiency increases, L/100 km decreases while MPG and km/L increase. The converter handles this inverse relationship correctly.
The converter normalizes all values to km/L as the intermediate unit. Key relationships: 1 MPG (US) = 0.425144 km/L, 1 MPG (Imp) = 0.354006 km/L, L/100 km = 100 / km/L, 1 mi/L = 1.60934 km/L. The inverse nature of L/100 km requires the formula 100/value for conversion.
Typical fuel economy ranges: Economy car: 30-40 MPG / 6-8 L/100km, Hybrid: 45-60 MPG / 4-5 L/100km, SUV: 20-28 MPG / 8-12 L/100km, Truck: 15-22 MPG / 11-16 L/100km. Electric vehicles use kWh/100 km instead.
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Results
25 MPG = 9.41 L/100km
Inputs
Results
5 L/100km = 47 MPG
Divide 235.215 by the MPG value. Example: 30 MPG = 235.215 / 30 = 7.84 L/100 km. The relationship is inverse — higher MPG means lower L/100 km.
The US gallon (3.785 L) is smaller than the Imperial gallon (4.546 L). So the same car gets about 20% higher MPG in Imperial than US units. 30 US MPG = 36 Imperial MPG.
Under 6 L/100 km is excellent, 6-8 is good, 8-10 is average, 10-13 is below average, above 13 is poor. Hybrids achieve 3-5 L/100 km.
Above 35 MPG (US) is excellent, 25-35 is good, 20-25 is average, below 20 is poor. Hybrids achieve 45-60 MPG.
Cold weather reduces fuel economy by 10-20% due to engine warm-up, higher fuel viscosity, winter fuel blends, and increased electrical loads (heating, defrosting).
MPG measures distance per fuel volume (higher = better). L/100 km measures fuel volume per distance (lower = better). They are reciprocally related: MPG(US) = 235.215 / (L/100km).
Multiply km/L by 2.35215 to get MPG (US), or by 2.82481 for MPG (Imperial).
Diesel engines typically achieve 15-30% better fuel economy than gasoline. But diesel fuel is denser, so the cost per mile difference is smaller. LPG and CNG have lower energy density.
The US Environmental Protection Agency (EPA) rates vehicles' fuel economy through standardized lab tests. City, highway, and combined MPG ratings are posted on every new vehicle window sticker in the US.
EVs use kWh/100 km or MPGe (miles per gallon equivalent). 1 gallon of gasoline = 33.7 kWh. A typical EV achieves 100+ MPGe or 15-20 kWh/100 km.
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