Trip Fuel Cost Calculator
Enter your distance, fuel efficiency, and price per gallon for gas or diesel to see what the drive will cost.
Fuel Type
National average as of — edit to match your local price.
Trip Cost
$0.00
Gallons Needed
0.0
Trip Fuel Cost, Explained
The math is simple: your trip distance divided by your vehicle's MPG gives the gallons you'll need, and multiplying that by the price per gallon gives the total cost. Check "Round trip" to automatically double a one-way distance instead of doing the math yourself.
Gas and diesel aren't directly comparable on price alone. Diesel often costs more per gallon, but diesel engines frequently get noticeably better fuel economy than comparable gas engines, which can offset or even reverse the cost difference over a given trip.
The price per gallon starts at a recent national average, but pump prices vary a lot by region and change week to week — always worth editing to your local price for an accurate number.
FAQ
How is trip fuel cost calculated?
Your trip distance is divided by your vehicle's MPG to get gallons needed, then multiplied by the price per gallon for the total cost.
Should I use round-trip or one-way distance?
Toggle "Round trip" to automatically double a one-way distance, or enter the full round-trip mileage directly and leave it unchecked.
Is diesel always more expensive than gas?
Diesel often costs more per gallon than gasoline, though the gap varies by region and season. Diesel vehicles frequently get better fuel economy, which can offset the higher price per gallon.
Where does the default price per gallon come from?
It's set to a recent national average and is fully editable — pump prices vary significantly by region and change frequently, so enter your local price for an accurate estimate.
What if I don't know my vehicle's MPG?
Check your owner's manual or the window sticker for the EPA-estimated combined MPG, or look up your make, model, and year online.
Does this account for traffic, tolls, or other trip costs?
No — this covers fuel cost only, based on distance and fuel efficiency.
