MPG (UK) to L/100 km Converter
1 mile per UK gallon = 282.4809 liters per 100 km
Type a value in either box: the conversion between miles per UK gallon (mpg (UK)) and liters per 100 km (L/100 km) updates instantly.
Good to know
UK mpg figures look about 20% higher than US mpg for the same car, because the imperial gallon is larger. 50 UK mpg is about 5.6 L/100 km.
How to convert miles per UK gallon to liters per 100 km
Fuel economy units are reciprocals: one measures distance per fuel, the other fuel per distance. So instead of multiplying, divide a constant by the value:
L/100 km = 282.481 ÷ mpg (UK)
Worked examples
- 30 mpg (UK) = 9.416031 L/100 km
- 40 mpg (UK) = 7.062023 L/100 km
- 50 mpg (UK) = 5.649619 L/100 km
- 65 mpg (UK) = 4.345861 L/100 km
MPG (UK) to L/100 km conversion table
| MPG (UK) (mpg (UK)) | L/100 km (L/100 km) |
|---|---|
| 15 mpg (UK) | 18.83206 L/100 km |
| 20 mpg (UK) | 14.12405 L/100 km |
| 25 mpg (UK) | 11.29924 L/100 km |
| 30 mpg (UK) | 9.416031 L/100 km |
| 35 mpg (UK) | 8.070884 L/100 km |
| 40 mpg (UK) | 7.062023 L/100 km |
| 45 mpg (UK) | 6.277354 L/100 km |
| 50 mpg (UK) | 5.649619 L/100 km |
| 55 mpg (UK) | 5.136017 L/100 km |
| 60 mpg (UK) | 4.708016 L/100 km |
| 65 mpg (UK) | 4.345861 L/100 km |
| 70 mpg (UK) | 4.035442 L/100 km |
| 80 mpg (UK) | 3.531012 L/100 km |
About the units
MPG (UK) (mpg (UK))
UK miles per gallon uses the imperial gallon of 4.546 liters, about 20% larger than the US gallon, so the same car shows a higher mpg figure in the UK.
L/100 km (L/100 km)
Liters per 100 kilometers (L/100 km) is how fuel consumption is stated in Europe, Australia, China and most of the world. Lower numbers mean a more efficient car.
Frequently asked questions
How do I convert miles per UK gallon to liters per 100 km?
L/100 km = 282.481 ÷ mpg (UK)What is 40 mpg (UK) in liters per 100 km?
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.