Fuel Cost Calculator
Estimate fuel needed and total trip cost
Estimate how much fuel a trip will use and what it'll cost. Enter the distance, your vehicle's efficiency, and the fuel price.
Estimate fuel needed and total trip cost from distance, vehicle efficiency, and fuel price.
Fuel Needed
12.00
gal
Total Fuel Cost
$42.00
How to Use This Calculator
- Enter the trip distance (in miles or kilometers, matching your efficiency unit).
- Choose your efficiency unit (MPG or L/100km) and enter the figure.
- Enter the fuel price per gallon or liter.
- Review the fuel needed and the total cost.
Why Use This Calculator?
- Budgeting fuel for a road trip.
- Comparing the running costs of two vehicles.
- Estimating commuting costs over a month.
Real-World Examples
300 miles at 25 mpg, $3.50/gal
The trip uses 12 gallons and costs about $42 in fuel.
The basic math
Fuel used = distance ÷ efficiency. Cost = fuel used × price. For 300 miles at 25 mpg, that's 12 gallons; at $3.50 each, $42 total.
Frequently Asked Questions
Does it account for city vs. highway driving?
No. Use an average efficiency that reflects your typical mix, since city driving usually lowers mileage.
Why is my real-world mileage different?
Driving style, speed, load, weather, and maintenance all affect real fuel use. The figure you enter is an estimate.
Can I use liters and kilometers?
Yes — switch to L/100km and use kilometers for distance and price per liter for the fuel price.
Important Disclaimer
An estimate based on the efficiency and price you enter. Real fuel use varies with driving conditions and vehicle condition.
Privacy
Your entries stay in your browser and aren't stored or transmitted.
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