Fuel Calculators

Ever wondered how much that trip to the shop really costs you? How much fuel you're going to need to get to your relatives miles and miles away? Or maybe you are just curious to see how litres per 100km really compares to the good old fashioned MPG?

Well wonder now more! The calculators on this page are totally free to use and are designed to help you get a real idea of what the real cost of those trips cost you. You'll need javascript enabled in your browser to use these calculators - please refer to your browser's help file (press the "F1" key) for help.

Journey Cost

To calculate how much a journey will actually cost in fuel, please provide the miles covered, the estimated MPG for your vehicle, and the price of your petrol in pence.

Miles miles
MPG mpg
Fuel Cost pence/Litre

Our app is also available for your Android phone!
Fuel Economy calculator Android app on Google Play

Or if apps aren't your thing why not try our new petrol calculator at Petrol-Calculator.co.uk?

Required Fuel

To calculate how much fuel you'll need for a given journey, please provide the distance in miles you will be covering on your journey, and the estimated MPG of your vehicle.

Distance miles
MPG mpg

Real-Life Miles Per Gallon

To work out what MPG you are really getting, please provide the cost of the fuel, how much you spent on the fuel, and how far it took you. For example, the cost of the fuel could be 96.9, the amount could be 10 pounds, and the distance covered could be 80 miles.

Fuel Cost pence/Litre
Total Spend pounds
Distance miles

Litres/100KM & Miles Per Gallon

To convert between Litres per 100KM and Miles Per Gallon, please provide a value and click on the required button. For example, to find out the equivalent MPG value for 6L/100KM, please put "6" in the value text box then click on the "Convert from L/100KM to MPG" button.