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Fuel Cost Calculator

From distance, fuel consumption and price per liter: total fuel, trip cost and cost per km.

Result

How it is calculated

The tool converts consumption per 100 km into fuel for your trip, then prices it: fuel = distance / 100 × consumption, trip cost = fuel × price, cost per km = trip cost / distance. Distance is in kilometres, consumption in litres per 100 km and price in money per litre. Negative values return nothing, and with a distance of zero the cost per km is shown as zero. Amounts appear with a dollar sign, but the number is simply in whatever currency you typed the price in. The result covers fuel only; tolls, parking, wear and insurance are not included.

Worked example

You drive 450 km in a car that uses 7.5 L per 100 km, and fuel costs 1.8 per litre. Fuel used: 450 / 100 × 7.5 = 33.75 L. Trip cost: 33.75 × 1.8 = $60.75. Cost per kilometre: 60.75 / 450 = 0.135, shown as $0.14.

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Common mistakes

  • Entering miles per gallon in the consumption box; it needs litres per 100 km, and the two scales run in opposite directions.
  • Typing the price per gallon or per 10 litres instead of per litre.
  • Entering a one-way distance for a return trip, which halves the real cost.
  • Using the brochure consumption figure for a car that is driven in town traffic or loaded with luggage, which burns more.
  • Reading the dollar sign literally: the figure is in the currency of the price you entered.

About this calculator

This calculator estimates how much fuel a trip or period of driving will cost by combining distance traveled, a vehicle's fuel efficiency figure, and the current price of fuel, converting the distance into an amount of fuel consumed and then into a total cost. It works in liters per hundred kilometers, the consumption figure European fuel-economy ratings use.

Drivers use it to budget for a road trip before setting out, to estimate the ongoing cost of a daily commute, or to compare the running cost of two different vehicles with different efficiency ratings before deciding which one to buy or use for a particular trip.

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Comments (1)

  • Editorial team

    Trip-computer consumption tends to be optimistic. A steadier figure is to fill the tank, note the odometer, drive as usual, fill up again, and divide the litres added by the kilometres driven, then multiply by 100. City and motorway driving usually differ a lot, so run the tool once for each. For a return journey, enter the total of both legs. Only fuel is counted, with no tolls or parking. How do you work out your own consumption?

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