Calculate total fuel cost and cost per person for your road trip. Free online gas cost calculator with formula, examples, and FAQ.
The fuel cost calculator helps you estimate the total fuel expense for your road trip based on distance, vehicle fuel efficiency, and current gas prices. This is essential for travel budgeting, comparing driving vs. flying costs, and splitting expenses among travel companions.
Gallons Needed = Distance ÷ Fuel Efficiency (MPG)
Total Fuel Cost = Gallons Needed × Fuel Price
Cost Per Mile = Fuel Price ÷ MPGMiles per gallon (MPG) represents how many miles your vehicle travels on one gallon of fuel. Divide total distance by MPG to find gallons needed, then multiply by the price per gallon. Cost per mile is a useful metric for comparing vehicles and budgeting.
| Input | Output |
|---|---|
| 500 miles, 25 MPG, $3.50/gal | 20 gallons, $70.00 one-way, $140.00 round-trip |
| 1200 miles, 30 MPG, $3.25/gal | 40 gallons, $130.00 one-way, $260.00 round-trip |
| 200 miles, 20 MPG, $4.00/gal | 10 gallons, $40.00 one-way, $80.00 round-trip |