Fuel calculator
Miles and Litres to MPG Calculator
Enter a distance in miles and the litres used to calculate your UK / imperial MPG straight away.
Use this calculator
Enter the distance driven and litres used to calculate UK MPG.
What your result means
This converts the distance and fuel used into UK / imperial MPG. The calculation first turns litres into UK gallons, so it must not be compared directly with US MPG.
Worked example
Using 300 miles and 30 litres:
- Miles driven
- 300 miles
- UK gallons used
- 6.6
The result is 45.46 UK MPG.
Formula
Common distance and fuel examples
| Miles driven | Litres used | UK MPG |
|---|---|---|
| 300 miles | 20 litres | 68.19 |
| 300 miles | 30 litres | 45.46 |
| 300 miles | 40 litres | 34.1 |
| 300 miles | 50 litres | 27.28 |
Helpful questions
Does this calculate UK or US MPG?
It calculates UK / imperial MPG using the 4.54609-litre UK gallon. Convert US MPG to UK MPG if required.
Why are litres converted to UK gallons?
UK MPG means miles per UK / imperial gallon. The calculator divides litres by 4.54609 to find the UK gallons used before working out the MPG.
Related calculators
- MPG Calculator
Calculate your real-world UK fuel economy.
- Kilometres and Litres to MPG Calculator
Calculate UK MPG directly from kilometres driven and litres used.
- MPG to L/100km Converter
Convert UK MPG and litres per 100km.