Fuel Cost Calculator
Enter your values below and click Calculate for instant results.
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Calculate road trip fuel cost from distance and MPG. Supports miles and km, MPG and L/100km, and splits cost per passenger.
Enter your values below and click Calculate for instant results.
Fuel cost is one of the most predictable expenses in a road trip and one of the easiest to calculate in advance. Knowing the cost before you leave lets you budget accurately, compare driving versus flying, decide whether to take one car or two, and split the cost fairly among passengers.
Gas prices vary significantly across regions and can change week to week. Before a long trip, check current prices at GasBuddy or AAA to get a realistic per-gallon figure for the states you will be driving through rather than using your local price.
The EPA fuel economy rating on your car's window sticker is a laboratory estimate. Real-world MPG is typically 10 to 20% lower due to driving conditions, speed, climate, load, and driving habits. For a more accurate road trip estimate, use the MPG you actually observe from your recent fill-ups rather than the EPA figure.
When carpooling or road-tripping with others, splitting fuel costs evenly per person is standard practice. This calculator shows the per-person cost for any number of passengers, making the split easy to calculate and communicate.