Budgeting for a road trip's fuel cost means combining three factors — total distance, your vehicle's fuel efficiency, and the current gas price — into one final dollar estimate before you hit the road.
This calculator divides your total trip distance by your vehicle's miles-per-gallon rating to find gallons needed, then multiplies by the current price per gallon for a straightforward total fuel cost estimate.
For a multi-leg trip with varying gas prices along the route, using an average expected price gives a reasonable overall estimate, though actual cost may vary somewhat as prices differ between the regions and stations you'll pass through.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
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Because there's no sign-up or installation step, you can jump straight from a search result to a working tool in a couple of seconds.
The interface is intentionally simple, so there's no learning curve — the input goes in, the result comes out, and that's the whole interaction.
Frequently asked questions
Does this account for highway versus city driving differences?
No, this uses a single overall MPG figure you provide; if you know your vehicle gets notably different mileage on highway versus city driving, use a blended average that best represents your actual planned route.
How can I find my vehicle's actual MPG?
Check your vehicle's manual or window sticker for the EPA-estimated rating, or calculate your own real-world average by dividing miles driven by gallons used over a recent fill-up.