How it works
Enter the one-way distance, your vehicle’s fuel economy and the price of gas. Choose round trip to double the distance, and add travelers to split the cost.
Use your real-world highway mileage if you know it. Window-sticker numbers are a good starting point, but speed, cargo, roof boxes and air conditioning can lower fuel economy by 10% or more.
This covers fuel only. Tolls, parking and wear on the vehicle are extra.
Formula
Cost = distance ÷ MPG × price per gallon (or distance × L/100 km ÷ 100 × price per liter)
Questions people ask
How do I find my car’s MPG?
Fill the tank, reset the trip meter, drive normally, then refill. Divide the miles driven by the gallons it took to refill. The MPG calculator on this site does the math.
Does driving faster use more gas?
Yes. Most cars are most efficient around 50 to 60 mph; above that, aerodynamic drag rises quickly and fuel economy drops.
How do I convert L/100 km to MPG?
Divide 235.21 by the L/100 km figure. For example, 8 L/100 km is about 29.4 US mpg.