Fuel Cost Calculator
Trip fuel cost by distance, efficiency and price · free, no signup
Free Fuel Cost Calculator — Work Out What Your Trip Will Cost
Before a road trip or a commute change, it helps to know what the fuel will cost. Enter the distance, your car’s fuel efficiency and the price of fuel and this calculator shows how much fuel you will use and what it will cost, one way or as a round trip, and how much each passenger pays if you share.
It understands the different ways drivers measure efficiency — miles per gallon (US and UK gallons), kilometres per litre and litres per 100 kilometres — and lets you enter distance in miles or kilometres and fuel price per litre or per gallon, so you do not have to convert anything by hand.
Key features
Any unit system
Miles or kilometres, MPG (US/UK), km/L and L/100 km.
Round trips
Double the trip with one tick.
Passenger split
Shows the cost per person for carpools.
Cost per distance
See the cost of each mile or kilometre.
How to use it
- Enter the trip distance and pick miles or kilometres.
- Enter your fuel efficiency and its unit.
- Enter the fuel price per litre or per gallon.
- Read the fuel used, total cost and cost per person.
Worked example
Example
300 km, 8 L/100 km, price 1.50 per litre → 24 litres, cost 36.00 Round trip → 72.00; split between 3 people → 24.00 each
Who uses this tool
Drivers and commuters
Compare the cost of different routes or vehicles.
Holidaymakers
Budget a road trip in advance.
Carpoolers
Share fuel costs fairly.
Tips for the best results
- Real-world efficiency is often 10–20% worse than the official figure.
- Add a margin for hills, traffic, air conditioning and heavy loads.
- Use the price at the pump on your route, not the national average.
- Include tolls and parking separately.
Common mistakes to avoid
- Mixing US and UK gallons; a UK gallon is larger.
- Using city efficiency for a highway trip.
- Forgetting the return leg.
Why use AZRS QuickFix?
It is 100% free, needs no signup and has no watermark or usage limits. The tool runs in your browser, so what you type stays on your device, and it works on phones, tablets and desktops. New tools are added every week — bookmark this page or browse the full QuickFix toolbox.
Frequently asked questions
How do I calculate fuel cost for a trip?
Divide the distance by your efficiency to get fuel used, then multiply by the fuel price.
What is L/100 km?
Litres of fuel used per 100 kilometres — lower is better.
How do I convert MPG to L/100 km?
Divide 235.2 by the MPG (US) figure; the calculator does it automatically.
Does it work for electric cars?
You can use kWh per 100 km as the “litres” and the electricity price as the fuel price.
Can I split the cost?
Yes, enter the number of passengers.
Is it free?
Yes.