Free calculators

Your car, in numbers.

Calculate UK MPG, estimate petrol or diesel for a journey, and work out your car's cost per mile. Free calculators with no account required.

MPG and fuel consumption

Calculate UK MPG from miles driven and litres used. Convert to L/100 km, km/L or US MPG. Imperial and US gallons are kept separate.

Estimate petrol or diesel costs using miles, UK MPG and price per litre. Add tolls, parking and a return journey, then split the total.

Work out your car's cost per mile with fuel, insurance, servicing, vehicle tax and optional depreciation. See monthly and annual running costs.