Road Trip Cost Calculator
The Road Trip Cost Calculator computes road trip cost from the relation total cost = distance / mpg x fuel price + lodging + food. It takes 5 inputs (total distance in miles, vehicle fuel economy in mpg, fuel price in USD per gallon, lodging cost in USD, food cost in USD) and returns the road trip cost. Because this is a pure mathematical or physical formula rather than a jurisdiction-specific rule, the result never changes over time: the same inputs always produce the same answer, so you can rely on it whether you are checking homework, sizing a design, or sanity-checking another tool. Enter your values in the fields below and the result updates instantly; you can also share a permalink that pre-fills the exact calculation, which is useful for teaching, reports, or collaboration. For example, with total distance = 500 miles, vehicle fuel economy = 25 mpg, fuel price = 4 USD per gallon, lodging cost = 0 USD, food cost = 0 USD, the road trip cost works out to 80, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by US DOE fueleconomy.gov, and the figure above each result carries the date it was last verified. This tool is general information and is not a substitute for professional engineering, medical, financial, or scientific advice; always check critical results against the primary source and your own judgement.
With Total distance = 500 miles, Vehicle fuel economy = 25 mpg, Fuel price = 4 USD per gallon, Lodging cost = 0 USD, Food cost = 0 USD, the result is 80.
Applies to: any numeric inputs. Method source: US DOE fueleconomy.gov, checked 2026-06-23.
The formula
total cost = distance / mpg x fuel price + lodging + food
Worked example
With Total distance = 500 miles, Vehicle fuel economy = 25 mpg, Fuel price = 4 USD per gallon, Lodging cost = 0 USD, Food cost = 0 USD:
- fuel cost = distance / mpg x price = 80.00
- total = fuel + lodging + food = 80.00
- Road Trip Cost = 80
This worked example is one of the automated golden-value tests this calculator must pass before it can publish.
What this assumes
- Inputs are real numbers in the units shown.
- The result is the exact value of total cost = distance / mpg x fuel price + lodging + food; general information, not professional advice.
Frequently asked questions
What formula does this use?
total cost = distance / mpg x fuel price + lodging + food, the standard form documented by US DOE fueleconomy.gov.
Does the result ever change over time?
No. This is a pure formula with no external rate, so the same inputs always give the same result.
Official sources and verification
- Method: US DOE fueleconomy.gov, checked 2026-06-23.
Reviewed by the CalculatorHub team, edited by James Graham, 2026-06-23. See our methodology. General information, not professional advice.