Everyday Life

Fuel Cost Calculator

Work out how much fuel a trip needs and what it will cost — in km/L, L/100km or miles per gallon, with an optional return journey.

Calculator

Fuel cost calculator

Live result

Enter the distance, your vehicle's efficiency and the fuel price.

Currency neutral and private

Enter prices in any currency. The calculation runs entirely in your browser.

How trip fuel cost is calculated

With km per litre: fuel = distance ÷ efficiency and cost = fuel × price. A 250 km trip in a car doing 13 km/L needs 19.23 litres; at 2.05 per litre that is 39.42.

L/100km mode

European consumption figures are the other way round — lower is better. Here fuel = distance × L/100km ÷ 100, so 250 km at 7.5 L/100km uses 18.75 litres.

Miles per gallon

In MPG mode the distance is in miles and the price is per gallon: gallons = miles ÷ MPG. 300 miles at 32 MPG needs 9.38 gallons.

Tips for a more accurate estimate

  • Use your real-world average, not the manufacturer figure.
  • Highway driving is usually more efficient than city traffic.
  • Air conditioning, roof racks and heavy loads all increase consumption.

Good to know

Frequently asked questions

Which efficiency unit should I use?

Pick the one your dashboard shows: km/L and L/100km for metric countries, MPG where distances are in miles.

How does the round-trip option work?

It doubles the distance you entered, so you can type the one-way journey and still see the full there-and-back cost.

Which currency does it use?

None in particular — the calculator works with whatever numbers you enter, so results are in your own currency.

Why is my real fuel cost different?

Driving style, traffic, terrain, load and weather all change consumption. Use your own recorded average for the closest estimate.