Question 1

How do I convert L/100km to MPG?

Accepted Answer

MPG (US) = 235.215 ÷ L/100km. MPG (UK) = 282.481 ÷ L/100km. Example: 8 L/100km = 29.4 MPG (US). Lower L/100km = better (inverse relationship).

Question 2

Why does Europe use L/100km instead of MPG?

Accepted Answer

L/100km directly shows fuel consumption for trip planning. Its linear: twice the L/100km means twice the fuel cost. MPG is non-linear and harder to average correctly.

Question 3

Why does the US use MPG while others use L/100km?

Accepted Answer

MPG (higher = better) is intuitive for comparing. L/100km (lower = better) better shows fuel savings - halving consumption halves L/100km but doesn't double MPG.

Question 4

How does speed affect fuel economy?

Accepted Answer

Most vehicles are most efficient at 45-65 mph. Above 65 mph, every 5 mph increase is like paying an extra $0.20-0.30 per gallon.

L/100km to mpg Converter

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