Calculate fuel consumption, cost, and efficiency
The Fuel Cost Calculator works out what a drive actually costs, whether you're planning a road trip, comparing two vehicles, or just trying to figure out where your gas money is going each month. Instead of guessing or doing the math by hand, you plug in distance, fuel price, and your vehicle's fuel efficiency, and it returns the total cost along with the underlying mileage figures. It's built for anyone who wants a quick, reliable number before they fill up or hit the road — commuters budgeting for gas, drivers pricing out a long-distance trip, or people shopping for a more fuel-efficient car.
At its core, the tool handles the two calculations people usually need: how much fuel a trip will burn based on your car's MPG (or L/100km) rating, and what that fuel will cost at a given price per gallon or liter. It supports both miles and kilometers, so it works whether you're planning a drive across US interstates or through countries that measure in metric. You enter your trip distance, your vehicle's fuel consumption rate, and the current fuel price, and it converts those into total fuel needed and total trip cost — useful for splitting gas costs with passengers, comparing routes, or estimating a monthly commuting budget.
Because everything runs directly in your browser, there's no account to create and no data sent anywhere — your trip details, fuel prices, and mileage figures stay on your device. That also means the calculator responds instantly as you adjust numbers, which makes it easy to test a few scenarios back to back: what if gas prices rise, what if you take the highway instead of surface streets, or what if you're renting a less efficient vehicle for a trip. A practical habit is to check your fuel price against a recent fill-up receipt so the estimate reflects what you're actually paying at the pump, not an outdated average.
Estimate total fuel cost and consumption for any trip by entering distance, fuel efficiency, and fuel price.
Select miles or kilometers depending on how your trip distance and vehicle efficiency are measured.
Type in the total distance you plan to drive, either one-way or round trip.
Input your car's MPG (or L/100km) rating, found in your vehicle manual or from past fill-ups.
Add the price per gallon or per liter you expect to pay, based on local gas prices.
The calculator instantly shows the fuel needed for the trip and the total estimated cost.
Change the price, distance, or MPG to see how different routes, vehicles, or gas prices affect your total cost.