Fuel Trip Calculator
Estimate how much fuel your trip will cost.
This estimate is based on average MPG and fuel price. Actual fuel use may vary because of traffic, speed, terrain, weather, and driving conditions.
How to use the Fuel Trip Calculator
Plan a road trip by estimating how many gallons of fuel you will use and what the trip will cost. Enter your driving distance, vehicle fuel economy, and fuel price to get a quick estimate.
How the calculation works
Gallons needed = trip miles ÷ MPG. Estimated fuel cost = gallons needed × price per gallon.
A 400-mile trip in a vehicle averaging 25 MPG uses about 16 gallons. At $3.00 per gallon, the estimated fuel cost is $48.
Frequently asked questions
How do I calculate gas cost for a round trip?
Use the total round-trip mileage, or enable the round-trip option if available.
Should I use city or highway MPG?
Use the MPG that best matches the driving you expect. For mixed driving, use your normal real-world average.
Does this include tolls or parking?
No. This calculator estimates fuel. Use the Road Trip Cost Split tool for additional shared expenses.