Gas Mileage Calculator
Enter distance and fuel used to compute both MPG (mi/gal) and L/100km.
Input Data
Results
31.4
7.5
At a glance:Metric: L/100km = used(L) ÷ km × 100. Imperial: MPG = mi ÷ gal. The two convert as 1 MPG ≈ 235.215 ÷ L/100km.
Formula
metric: lPer100km = fuelUsed ÷ distance × 100; mpg = (distance ÷ 1.609344) ÷ (fuelUsed ÷ 3.78541).
imperial: mpg = distance ÷ fuelUsed; lPer100km = (fuelUsed × 3.78541) ÷ (distance × 1.609344) × 100.
How to Use
- Choose the input unit system, then enter distance and fuel used.
- Get MPG and L/100km instantly.
FAQ
Is higher MPG better?
Yes — higher MPG means more distance per fuel (more efficient); L/100km is the inverse, so lower is better.
Why show both?
North America uses MPG, Europe/Asia use L/100km; showing both aids cross-region comparison.
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References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.