Fuel Cost Calculator – Estimate Your Trip's Fuel Cost
Estimate the fuel needed and cost for a trip.
About the Fuel Cost Calculator
What is the Fuel Cost Calculator?
A fuel cost calculator estimates how much fuel a trip needs and what it will cost based on distance, efficiency and fuel price.
Why use this calculator?
Budgeting a road trip or comparing vehicles is easier when you can put a dollar figure on fuel use.
How to use it
- Enter the trip distance and whether it is in miles or kilometres.
- Enter your fuel efficiency in mpg, L/100 km or km/L.
- Enter the price of fuel and whether it is per gallon or per litre.
Formula
Fuel used depends on the efficiency unit; cost is fuel used × price per unit.
Convert all distances to a common unit internally so mixed metric and imperial inputs still work.
Frequently Asked Questions
Can I mix miles with litres?
Yes. Enter the distance in miles and the price per litre, and the calculator converts between the systems internally.
How accurate is the estimate?
It assumes a steady efficiency. Real-world fuel use varies with speed, traffic, load and terrain, so treat it as a guide.
Can I print or share my result?
Yes. Use your browser's print function or screenshot the result. The page is designed to print cleanly.
What if my inputs are outside the typical range?
The calculators accept a wide range of values, but extreme inputs may produce unrealistic results. Double-check the units you are using.
How often is the calculator updated?
We review formulas and rates periodically to keep them aligned with current standards and published data.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.
Is the information I type kept private?
Yes. All calculations run locally in your browser. Nothing you enter is uploaded, stored or shared with anyone.