⛽ Road Trip Gas Cost Calculator
Work out the fuel cost of a road trip and how much each passenger should chip in. For a round trip, double the distance.
Result
Estimates only. Results depend on your inputs and are not financial, tax or legal advice.
How this is calculated
Gallons needed = miles ÷ mpg. Cost = gallons × price per gallon, then divided by the number of people.
Frequently asked questions
Which mpg should I use?
Use your car’s highway rating for long trips, or your own measured average.
Does speed matter?
Yes. Above about 55 mph fuel economy drops noticeably in most cars.