Free Fuel Cost Calculator
Planning a road trip? Enter the distance, your vehicle’s fuel efficiency and the current fuel price to see exactly how much fuel you’ll need and what the trip will cost — in miles/gallons or km/litres.
How to Use the Fuel Cost Calculator
- Choose miles/gallons or kilometers/litres.
- Enter trip distance, vehicle efficiency and fuel price.
- Click Calculate Fuel Cost for fuel used and trip cost.
Features
Supports both US (mpg, $/gallon) and metric (L/100km, $/litre) systems with automatic label switching. Results include fuel used, cost per mile/km and cost per 100 miles/km.
Benefits & Use Cases
Road-trippers budget accurately before leaving, commuters compare the true cost of driving vs transit, and car shoppers weigh fuel costs between models.
Tips
Use your real-world efficiency, not the manufacturer’s ideal figure — city driving and AC can raise consumption 20–30%. Check fuel prices along your route, not just at home.
Frequently Asked Questions
How is trip fuel cost calculated?
Distance ÷ efficiency gives fuel used (gallons or litres); multiply by price per unit for the cost.
mpg vs L/100km — which is better?
They measure the same thing inversely; the tool accepts both and labels everything accordingly.
Does it account for traffic?
No — it uses the efficiency you enter, so use a realistic mixed-driving figure for city trips.
Can I compare two cars?
Yes — run the calculation twice with each car’s efficiency to see the cost difference.
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