Fuel Cost Calculator
Estimate trip fuel cost from distance, vehicle MPG, and gas price for commuting, delivery, and travel planning.
Calculate your result
Change any value and the estimates update immediately. Nothing entered here is sent to our server.
What the estimate includes
Fuel cost is based on trip distance, miles per gallon, and price per gallon. It helps compare routes, commute costs, delivery pricing, and road trip budgets.
Numbers to verify
Your actual MPG can change with traffic, speed, tire pressure, weather, cargo weight, and driving style. Use recent real-world MPG for better estimates.
Business use
For delivery or client travel, fuel is only one part of vehicle cost. Maintenance, depreciation, insurance, tolls, and parking may matter too.
Planning tip
Run the trip one way and round trip. People often underestimate total cost by forgetting the return drive or repeated weekly trips.
How to use it
- Enter trip distance, MPG, and gas price.
- Review estimated gallons and fuel cost.
- Adjust distance for round trips, detours, or repeated travel.
How the calculation works
Fuel needed equals trip distance divided by miles per gallon. Cost equals gallons needed multiplied by price per gallon. The result excludes tolls, parking, maintenance, idling, detours, and differences between rated and real-world fuel economy.
Worked example
A 320-mile trip in a vehicle averaging 28 MPG at $3.45 per gallon uses about 11.43 gallons. For a round trip, enter the complete distance rather than doubling the result mentally.
Frequently asked questions
Should I use highway or combined MPG?
Use the number that best resembles the route; your recent real-world average is usually more useful than a label estimate.
Does this include return travel?
Only if the distance input includes it.
Calculation method and page content last reviewed: July 20, 2026.
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