MPG Calculator – What's Your Real Fuel Economy?
Fill the tank, reset your trip meter, and next time you fill up enter the miles driven and litres added.
Enter the miles driven and litres added to see your MPG.
For the most accurate figure, fill to the same point both times and average over several tanks.
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See what's in a report →Frequently asked questions
How do I work out MPG?
Divide the litres used by 4.546 to get UK gallons, then divide the miles driven by that number.
Is UK MPG different from US MPG?
Yes. A UK gallon is about 4.55 litres and a US gallon is about 3.79 litres, so UK MPG figures are higher for the same car.