01
Metric road trip
A 400 km trip in a car that does 15 km per litre, with fuel at $1.60 a litre, uses 26.67 litres and costs $42.67 — about $0.11 per kilometre.
Fuel Cost Calculator
CalculatorsCalculate fuel cost for any trip from distance, mileage and gas price — free trip calculator.
Fuel efficiency: distance per litre for metric, or miles per US gallon for imperial.
About
About the Fuel Cost Calculator
Estimates how much fuel a trip will use and what it will cost, based on distance, fuel efficiency and fuel price.
Road-trippers and commuters use it to budget fuel costs before a drive, while anyone comparing two vehicles' running costs uses it to see the cost difference per kilometre or mile. It's one of many free calculators on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.
Examples
Fuel Cost Calculator examples
3 worked examples
02
Imperial commute
A 300-mile trip at 25 miles per US gallon with gas at $3.50 a gallon uses 12 gallons and costs $42.00 — $0.14 per mile.
03
Comparing two vehicles
Running the same 400 km distance and $1.60/L price through a 10 km/L car (40 L, $64.00) versus a 18 km/L car (22.22 L, $35.56) shows the more efficient car saves $28.44 on that trip.
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FAQ
Frequently asked questions
Quick answers to common questions about the Fuel Cost Calculator.
What does the Fuel Cost Calculator do?
It estimates how much fuel a trip will use and what that fuel will cost, based on distance, fuel efficiency and fuel price.
Is the Fuel Cost Calculator free to use?
Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.
Is my input safe when I use this tool?
Yes. The distance, efficiency and price you enter are processed entirely on your own device — nothing is sent to a server.
What units does the Fuel Cost Calculator support?
Kilometres with litres, or miles with US gallons. Fuel efficiency is entered as distance per litre for metric, or miles per US gallon for imperial.
What if I only know my car's efficiency in a different format, like L/100km?
Convert it to distance-per-litre first (100 divided by the L/100km figure gives kilometres per litre), then enter that value.
Does it include tolls, parking or other trip costs?
No. It calculates fuel cost only, based on distance, efficiency and fuel price — it doesn't account for tolls, parking or other expenses.
Can I use it to compare two different vehicles?
Yes. Run the calculation once per vehicle with the same distance and fuel price but each vehicle's own efficiency, then compare the total cost or cost per kilometre/mile.
Can I use the Fuel Cost Calculator on my phone?
Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.