Fuel Cost Calculator
Calculate the fuel cost for any road trip. Enter distance, fuel efficiency, and gas price to get total cost. Supports MPG, L/100km, and km/L.
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Frequently asked
questions
To convert MPG to L/100km: divide 235.215 by MPG. Example: 30 MPG = 235.215/30 = 7.84 L/100km. To convert L/100km to MPG: divide 235.215 by L/100km.
The CO₂ calculation uses the EPA average of 8,887 grams of CO₂ per gallon of gasoline (19.6 lbs/gallon). Actual emissions vary slightly by fuel blend, altitude, and driving conditions.
Check your car's window sticker, the fueleconomy.gov database, or calculate it yourself: fill up, reset the trip odometer, drive normally, fill up again — divide miles driven by gallons used.