UK MPG calculator
Calculate UK miles per gallon from miles driven and litres used, then convert to litres per 100km.
Use your real MPG with FuelRoute’s route planner so detour recommendations reflect how thirsty your car is.
Frequently asked questions
Is this UK MPG or US MPG?
FuelRoute uses imperial (UK) gallons. One UK gallon is 4.54609 litres.
How do I get a reliable MPG reading?
Fill the tank, reset your trip meter, drive normally, then refill and divide miles driven by UK gallons used.
Why does MPG matter for fuel stops?
Detour cost depends on efficiency. FuelRoute can use MPG so cheaper stations are only recommended when they still save money.