Fuel Cost Calculator
Estimate the fuel cost of a trip based on distance, your vehicle's fuel efficiency, and the price of fuel.
How fuel cost estimates work
Calculating fuel cost for a trip comes down to two core numbers: how much fuel your vehicle will consume over the distance, and how much that fuel costs. This calculator divides trip distance by your vehicle's fuel efficiency to estimate total fuel needed, then multiplies that by the current price per unit of fuel to arrive at an estimated total cost.
Why real-world fuel efficiency often differs from EPA ratings
Official fuel efficiency ratings (like the MPG figure on a vehicle's window sticker) are measured under controlled, standardized test conditions that don't always reflect real-world driving. Highway driving at consistent speeds typically achieves efficiency closer to the rated figure, while city driving with frequent stopping and starting, aggressive acceleration, running air conditioning, carrying heavy loads, or driving in cold weather can all reduce actual fuel efficiency below the official rating.
Why tracking your actual fuel efficiency matters
For the most accurate cost estimates, it's worth calculating your vehicle's actual real-world fuel efficiency rather than relying solely on the manufacturer's rating — simply divide miles driven by gallons used over a full tank to get a personalized figure. Using your actual efficiency rather than the official rating in this calculator will produce a more accurate cost estimate for your specific vehicle and driving conditions.
Does this account for traffic, terrain, or driving style?
No - this gives a straightforward estimate based on the average efficiency figure you enter. Actual fuel use varies with hills, traffic, load, and driving habits, so consider using your vehicle's real-world average rather than its official rating for a more accurate result.
Why does my fuel efficiency vary between trips?
Factors like outside temperature, wind resistance at highway speeds, tire pressure, vehicle load, and how much stop-and-go driving is involved can all meaningfully affect fuel efficiency from one trip to the next, even in the same vehicle.
How can I improve my fuel efficiency?
Maintaining steady speeds, avoiding rapid acceleration and braking, keeping tires properly inflated, removing unnecessary weight from the vehicle, and keeping up with regular maintenance can all contribute to better real-world fuel efficiency than the same vehicle driven less efficiently.