How much will my road trip cost in gas?
Trip fuel cost depends on how far you drive, your vehicle’s fuel economy and the price of fuel. Enter those three values to estimate the fuel-only cost of the trip.
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The calculator is prefilled with the example above. Change any input and the result updates immediately in your browser.
- Use the trip distance in the units expected by the calculator.
- Real fuel economy can differ from the rated value.
- Traffic, speed, load and weather can change consumption.
- The estimate covers fuel, not tolls, parking or maintenance.
Convert distance into fuel used
For mpg-based calculations, divide trip distance by miles per gallon to estimate gallons used. Multiply that amount by the fuel price to estimate cost.
Round-trip planning should include the full distance rather than only the outbound leg.
Use realistic efficiency
Highway fuel economy may differ from city driving, and a loaded vehicle can perform differently from a test-cycle rating. Use a recent real-world average when you have one.
Quick questions.
Does this include tolls?
No. It estimates fuel cost only.
Should I use highway mpg?
Use the efficiency that best matches the actual mix of driving on the trip.
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This page is connected to a working calculator, visible formula and public editorial policy. “NL Verified” refers to engineering checks, not external professional review.
Use the full calculator when the answer needs more depth.
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