**How much petrol do I need for 100 Km?** The petrol calculator below can quickly and accurately work out how much petrol you would need to travel** 100km** based on your vehicle’s fuel efficiency.

The calculator is set to 100 km by default, but you can change this distance if you need to. The petrol quantities required will be displayed in litres and UK gallons.

Don’t know your car’s fuel efficiency and how many miles per gallon it gets? Use this MPG calculator to find out now.