Fuel Efficiency Calculator
Calculate fuel consumption in L/100km, km/L, and MPG with trip and cost estimates
How to use Fuel Efficiency Calculator
- 1Enter the distance traveled and the fuel consumed for that trip.
- 2Enter the fuel unit and distance unit you prefer (mpg, L/100km, km/L).
- 3Read the efficiency and the equivalent value in your chosen unit system.
Measuring fuel efficiency
mpg = miles / gallons; L/100km = (L × 100) / km; km/L = km / LFuel efficiency expresses how far a vehicle travels per unit of fuel; lower L/100km is better, while higher mpg or km/L is better.
Real-world efficiency drops in city traffic, cold weather and with aggressive acceleration, so compare under similar conditions.
Frequently asked questions
Which unit is best?
US uses mpg, most of the world uses L/100km; pick what your region reads natively.
Why does my car beat the label?
Labels use standardized cycles; real driving with AC and hills differs.
How to improve mpg?
Keep tires inflated, reduce idling and excess weight, and drive smoothly.
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