Divide 235.215 by either figure to convert between L/100km and US MPG — 8 L/100km is about 29.4 MPG. Trip fuel = km ÷ 100 × L/100km; cost = liters × price.
Results are computed from your inputs and rounded for display. Verify important figures independently.
Two jobs in one tool: convert consumption figures between the metric L/100km convention and US miles-per-gallon, and estimate a trip — how many liters a journey needs and what it will cost at your local price.
Formula & methodology
MPG = 235.215 ÷ (L/100km) and identically in reverse — the constant bridges miles↔km and US gallons↔liters (1 mile = 1.609344 km, 1 US gal = 3.785412 L).
350 km at 7.5 L/100km with fuel at 0.65/liter → 26.25 L, cost ≈ 17.06.
Limits
MPG here means US gallons; imperial MPG (UK) uses a different constant (282.481). Real-world consumption varies with load, speed, and traffic — use your car's measured average, not the brochure figure, for honest trip budgets.
Frequently asked questions
Why do lower L/100km numbers mean BETTER economy while lower MPG means worse?
They measure inverse things: L/100km counts fuel per fixed distance; MPG counts distance per fixed fuel. That inversion is exactly why the conversion is a division, not a multiplication.
Is this US or imperial MPG?
US. For imperial (UK) MPG divide 282.481 by the L/100km figure instead — the two gallons differ by about 20%.
