Vehicle Cost Calculator

The true cost of driving isn’t just how much money you spend.

A vehicle’s impact on the environment is a major cost to consider as climate change impacts many things including cost-of-living, the economy and quality of life.

One of the easier ways to measure individual carbon impact is by calculating the greenhouse gas emissions produced from each person’s driving habits based on chosen fuel type. We’ve used emission data from a recent* Guernsey vehicle carbon study to give you an idea of the lifecycle carbon emissions produced from electric, petrol and diesel vehicles driven on our local roads.

Enter an annual or vehicle lifetime mileage (such as 150,000km) to get a clear picture of the potential cost to drive using today’s fuel and electricity prices.
Make sure to enter fuel cost in pence i.e. 175 for £1.75. This page on Facebook usually keeps track of the latest fuel prices in Guernsey.
Charge an electric vehicle between 11pm and 5am for the cheapest and cleanest drive, as overnight is when we can rely on 100%-imported renewable electricity year-round.

This calculator is based on a number of assumptions to reflect an average vehicle and should be used as guidance only. These assumptions include average factors for emissions during production, average lifetime kilometers driven of 150,000 km, and fuel efficiency factors for an average diesel, petrol and battery electric vehicle based on available literature.

These carbon emission figures are based on Guernsey’s electricity mix including diesel-generated electricity from the power station. If you charge a vehicle between 11pm and 5am, the carbon intensity will be lower than the figures displayed here.

*Click here to read the life-cycle study of vehicle carbon impacts in Guernsey

Electric vehicles

Prices are correct as of 1 July 2022. Running cost based on 6.4km per kWh and carbon based on 98 grams of CO2 equivalent per km.

Petrol and diesel vehicles

Price should be researched by user. Running cost based on 10.56km per litre (or 30 miles per gallon) and carbon based on 280g (petrol) and 219g (diesel) of CO2 equivalent per km.

Carbon Dioxide Equivalent (CO2e) 

Carbon footprints are often measured in CO2e. This is a way to describe an object or action’s overall contribution to global warming taking into account carbon dioxide (CO2) alongside other greenhouse gases such as methane and nitrous oxide.