Fuel Cost Calculator
Work out how much a journey costs in petrol or diesel, enter your distance, fuel economy (mpg) and fuel price to see the cost per trip, per mile and, if you like, per year.
Estimate only. Fuel cost figures are estimates based on the mpg, distance and price you enter, actual costs vary with driving style, traffic, load and current fuel prices. Source (fuel price context): gov.uk weekly road fuel prices.
Enter your journey details
Your fuel cost per trip, per mile and per year appear here as you type.
How fuel cost is calculated
We convert your journey distance and fuel economy into gallons used (miles ÷ mpg), then into litres using the exact imperial conversion of 4.54609 litres per UK gallon. Multiplying litres by the fuel price in pence per litre gives the journey cost. For a return trip we simply double the distance before costing it. To estimate an annual figure, either enter how many times a week you make the journey (we multiply by 52 weeks) or enter your total annual mileage directly, both use the same per-mile cost.