Calculate the fuel cost for your next road trip.
Fuel cost = (distance / fuel efficiency) × fuel price per unit.
A 300-mile trip in a car getting 30 mpg at $3.50/gallon costs about $35.
Miles or kilometers for distance, and mpg or L/100km for efficiency, with the matching fuel price unit.
Double the distance, or enter the total distance for the whole journey.
Use your vehicle's average efficiency for the type of driving you will do.