Journey fuel cost calculator
Work out the fuel cost of a single journey or your daily commute, and split it between everyone in the car.
Settings
Know your mpg? Divide 282.5 by it for l/100 km. Driving electric? Enter kWh/100 km and the price per kWh.
Fuel cost
- Per person
- £0.00
- Per month
- £0.00
- Per year
- £0.00
How the journey cost is calculated
In kilometres and litres, the fuel used is the distance × consumption ÷ 100. A 25 km commute each way (50 km a day) in a car that uses 6.5 l/100 km burns 3.25 litres. Multiply by the price per litre for the cost of the journey, and divide by the number of people to split it.
UK mpg figures use the imperial gallon, which is about a fifth bigger than the US gallon of the miles option. To use your car’s mpg, divide 282.5 by it and enter the result in l/100 km: 45 mpg is about 6.3 l/100 km. Switching units converts the values you have entered.
Monthly and yearly totals are based on the journeys per week – 5 return journeys a week is a typical commute. For an electric car, enter the consumption in kWh/100 km and the price per kWh instead.
Frequently asked questions
How do I calculate the fuel cost of a journey?
Multiply the distance in kilometres by the consumption in l/100 km, divide by 100 and multiply by the price per litre. For 300 km in a car that uses 6 l/100 km with petrol at £1.40 a litre: 300 × 6 ÷ 100 × £1.40 = £25.20.
My car’s fuel economy is in mpg – what do I enter?
UK mpg uses imperial gallons. Divide 282.5 by your mpg to get litres per 100 km – 45 mpg is about 6.3 l/100 km – and use kilometres and litres. The Miles & US gallons option expects US mpg, which is about a sixth lower than the UK figure for the same car.
How do I split fuel costs between passengers?
Enter the number of people sharing the cost. The calculator divides the journey cost evenly between everyone, including the driver.
Does the calculator include wear, parking or tolls?
No, it counts fuel only. Wear and tear, insurance, road tax, parking and tolls come on top, so the full cost of driving is higher.