Fuel Consumption Converter - L/100km, MPG

  • Liters per 100 km (L/100km)
  • Miles per gallon US (MPG)
  • Miles per gallon UK (MPG)
  • Kilometers per liter (km/L)
  • Miles per gallon US (MPG)
  • Liters per 100 km (L/100km)
  • Miles per gallon UK (MPG)
  • Kilometers per liter (km/L)
Results
—
—

Convert fuel consumption between L/100km, US MPG, UK MPG, and km/L with our Fuel Consumption Converter. This is essential when comparing cars from different markets — European listings use L/100km, US listings use MPG, and the two scales run in opposite directions.

Because L/100km measures "fuel per distance" while MPG measures "distance per fuel", conversion uses division rather than multiplication: MPG (US) = 235.215 ÷ L/100km. Note that UK MPG is about 20% higher than US MPG for the same car because the imperial gallon is larger.

Quick anchors: 8 L/100km ≈ 29.4 MPG (US) ≈ 35.3 MPG (UK); 30 MPG (US) ≈ 7.8 L/100km. Under 6 L/100km is efficient for a modern car. Use the converter to compare real-world fuel economy across any market.

公式
km/L = 100 ÷ L/100km | MPG (US) = 235.215 ÷ L/100km | MPG (UK) = 282.481 ÷ L/100km

よくある質問

How do you convert L/100km to MPG?
Divide 235.215 by the L/100km value for US MPG, or 282.481 for UK MPG. For example, 8 L/100km ≈ 29.4 MPG (US). The formulas are inverses because L/100km is "amount used" and MPG is "distance per amount".
Why is L/100km inverse to MPG?
L/100km measures fuel used per distance (lower is better), while MPG measures distance per fuel (higher is better). They are reciprocal measures, so conversion uses division, not multiplication.
What is good fuel consumption?
For modern cars, under 6 L/100km (~39 MPG US) is efficient, 6-9 L/100km is average, and above 12 L/100km (~20 MPG US) is thirsty. Hybrids often achieve 4-5 L/100km.
Is UK MPG different from US MPG?
Yes. The imperial (UK) gallon is 4.546 L versus the US gallon at 3.785 L, so UK MPG figures are about 20% higher for the same real consumption. Always check which gallon is meant.

関連する計算機