Use this calculator to work out litres per 100 km and the equivalent MPG (UK) from distance travelled and fuel used.
Inputs
This topic also has a deeper guide and a printable reference pack, so you can move from the live answer into the method, assumptions, and worked examples without leaving the topic cluster.
These are the main values the calculator uses. Keep the units consistent and, where relevant, match the assumptions explained in the related guide.
Unit: km
Enter the trip distance in kilometres for the fuel-use period you want to analyse.
Unit: L
Use the litres of fuel consumed over the same trip or interval.
Use this page when you want to compare fuel efficiency across trips, vehicles, or driving styles using the actual distance and fuel figures you recorded.
The main result shows litres per 100 km, while the supporting value gives the equivalent MPG (UK) so you can compare trips in whichever unit is more familiar.
If a trip covers 450 km and uses 32 litres of fuel, the calculator converts that into litres per 100 km and an MPG (UK) figure for quick comparison.
This calculator only applies the numbers you enter. Traffic, weather, vehicle load, tyre pressure, and real driving conditions can shift the actual outcome.
No. This calculator is intentionally focused on fuel efficiency only, so it stays useful without depending on changing pump prices.
Calculate miles per imperial gallon from the distance and fuel quantity you enter, using UK gallon conventions consistently.
Use the Kilometres to Miles Calculator for everyday conversions, travel planning, or kitchen maths with clear units where relevant.
Use the Litres to Gallons (UK) Calculator for everyday conversions, travel planning, or kitchen maths with clear units where relevant.
Use the Miles to Kilometres Calculator for everyday conversions, travel planning, or kitchen maths with clear units where relevant.