Petrol vs diesel fuel cost calculator

Want to know how much your car costs to run each year? Our free fuel cost calculator lets you quickly work out the annual fuel cost for your car and compare it to another model.

To find out your fuel costs, you'll just need the following:

• The price per litre for petrol, LPG or diesel (whichever your car requires)
• The mpg (miles per gallon) figure for your car
• Your estimated total annual mileage (people who complete our annual car survey typically drive around 5,600 miles each year)

Of course, price isn't the only thing you should consider when buying a new car. Only cars that are reliable, economical, comfortable, safe and good to drive can become a Best Buy. Head to our best cars to find out the models we recommend. 

• Current average fuel prices are available on sites such as the RAC, but you can look up prices near you using services such as PetrolPrices.com.

Get your free Cars newsletter

The latest car news, deals, advice and more – every month.

Sign up now

Compare fuel costs for two cars

To enter details for a second car, click 'Add another car for comparison', then enter the relevant details.

If you're unsure of the mpg for the car you're thinking of buying, be sure to check our new and used car reviews.

We ignore manufacturer claims and calculate accurate mpg figures for every car we test.

To obtain these figures, we simulate driving in various locations.

Cut your driving costs

Spending too much money on petrol, diesel or electricity for your car? By making simple adjustments to the way you drive, you can make your fuel go further.

We explain all in our guide on how to save fuel and other money-saving driving tips.

Drive smarter and cut costs using our expert advice. Get our free monthly Cars newsletter