Litres to gallons converter

Convert litres to gallons

This handy fuel converter lets you convert from litres to UK gallons (which are larger than US gallons) and back again.

It’s useful when trying to calculate your fuel economy and when you are looking to convert litres into UK gallons at the petrol pump.

To get started, just choose whether you want to convert to litres or gallons. Then enter the amount you want to convert and hit calculate.

The result of your litres to gallons conversion will appear in the box at the bottom, and you can hit reset to start again.

Petrol prices

Fuel is always sold by the litre, though most UK drivers still think about fuel economy in miles per gallon. This can make mental fuel economy calculations a bit tricky.

And despite high prices across the UK, it is possible to search for the cheapest petrol in your area. The Which? guide to finding the cheapest fuel has tips on getting the best per-litre rates for petrol, diesel and LPG.

New, greener cars and the most efficient superminis use fewer litres of fuel – reducing driving costs and your impact on the environment. You can see which cars perform best for fuel efficiency in the Which? guide to greener cars, and in our in-depth car reviews in the Which? Car Buying Guide.

Fuel economy

Calculate your fuel economy

Sometimes cars’ trip computers give inaccurate fuel economy readings. To discover your car’s true mpg, check out the Which? fuel calculator. 

It allows you to work out the amount of fuel you used on recent trips, and you can see exactly how much you ended up paying for single journeys.

You may even find you could save cash by joining a car club such as Streetcar, City Car Club or Zipcar.

But, if you’re happy to stick with your existing car, read the Which? guide to greener driving. It’s packed with tips on saving money, driving safely and cutting your CO2 emissions. 

One of the simplest steps you can take to improve economy is to check you tyre pressures regularly, using a tyre pressure gauge.