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Fuel Cost Calculator
Work out what a journey costs in fuel from the distance, your consumption and the pump price.
Fuel cost calculator
Distance used: —
Fuel used: —
Trip cost: —
Cost per kilometre: — · Cost per mile: —
—
How to use the Fuel Cost Calculator
- Enter the distance and choose kilometres or miles.
- Set your fuel consumption and the price you pay at the pump.
- Tick the round trip box when the journey is there and back.
Features
- Trip cost from distance, consumption and price
- Litres per 100 km, km per litre and mpg
- Cost per kilometre and cost per mile
- Optional round trip that doubles the distance
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Frequently Asked Questions
Common questions about the free online fuel cost calculator.
The tool multiplies the distance by your consumption to get the fuel used, then multiplies
that by the price per litre or gallon.
Litres per 100 kilometres, kilometres per litre, and miles per US or UK gallon are all
accepted and converted automatically.
Enter the distance in miles, leave the round trip box clear and read the cost per mile line
in the results panel.
Yes. Tick the round trip box and the distance is doubled before the fuel used and the total
trip cost are calculated.
It is only as accurate as your figures. Traffic, speed, load and tyre pressure all change
real world fuel consumption.
Short trips, cold starts, air conditioning, roof racks and heavy loads all push consumption
above the published figure for a car.
Yes. Choose the US or UK gallon price and the tool converts it to a price per litre before
working out the trip cost.
Small petrol cars often use 5 to 7 litres per 100 kilometres, while larger cars, vans and
towing can use 8 to 12 or more.
No. Every figure is calculated locally in your browser and nothing you type is ever sent to a
server or stored.
Yes. It is completely free, needs no account and there is no limit on how many journeys you
can price up.
Last updated: October 10, 2026