Fuel Cost Calculator

What a trip costs in fuel, per person and per month.

L/100 km in metric mode, miles per gallon in US mode.
$52.50Fuel cost for the trip
$52.50Cost for you
30Litres used
Cost per kilometre
$0.131
Cost per 100 km
$13.13
If you drove this 20 times a month
$1,050.00

400 km at 7.5 L/100 km.

About the Fuel Cost Calculator

Fuel is the running cost drivers feel most directly, and it is easy to underestimate because it arrives in small amounts. This calculator turns a distance, a fuel economy figure and a pump price into the cost of a specific journey, then adds the numbers that make the decision: the cost per kilometre or mile, the cost split between passengers, and what the same trip would cost repeated twenty times a month.

The two economy conventions work in opposite directions. Litres per 100 km is a consumption figure, where lower is better, while miles per gallon is an efficiency figure, where higher is better. Pick the mode that matches your car dashboard. To convert between them, divide 235.2 by one to get the other.

How to use the Fuel Cost Calculator

  1. Choose metric or US units to match how your car reports fuel economy.
  2. Enter the one-way distance, your fuel economy and the current price of fuel.
  3. Tick the return-journey box if relevant, set how many people are sharing, and read the cost.

Frequently asked questions

How do I work out fuel cost per mile?

Divide the price per gallon by your miles per gallon. At 3.60 a gallon and 30 mpg the cost is 12 cents per mile, so a 400 mile trip costs 48.

How do I convert mpg to litres per 100 km?

Divide 235.215 by the US mpg value. A car doing 30 US mpg uses 7.84 L/100 km. For imperial mpg, divide 282.481 instead.

Does driving style change the result?

Considerably. Motorway speeds above 110 km/h, hard acceleration, roof boxes, cold weather and heavy loads can each add 10 to 20 percent to consumption, so use your real observed economy rather than the manufacturer figure.

Does this include tolls and wear?

No, it is fuel only. Tyres, servicing and depreciation typically add as much again per kilometre, which is why mileage reimbursement rates are much higher than the fuel cost alone.