How to convert miles per gallon (UK) to liters per 100 kilometers
- Take the value in miles per gallon (UK).
- Use the formula liters per 100 kilometers = 282.481 ÷ miles per gallon (UK).
- For example, 20 mpg (UK) is 14.12 L/100 km.
About miles per gallon and liters per 100 kilometers
UK mpg uses the imperial gallon of 4.54609 liters. To get liters per 100 km, divide 282.481 by the mpg figure, so 50 UK mpg is 5.65 L/100 km. It is a division rather than a multiply because the two units run in opposite directions.
UK fuel is sold by the liter, but car economy is still quoted in miles per imperial gallon. Converting to L/100 km lets you compare with European, Australian and Canadian figures, or with your own fuel receipts.
Examples
- 20 mpg (UK) (a large gasoline 4x4 or sports car) is 14.12 L/100 km
- 30 mpg (UK) (a large SUV) is 9.42 L/100 km
- 45 mpg (UK) (a typical gasoline hatchback) is 6.28 L/100 km
- 60 mpg (UK) (a frugal diesel or hybrid) is 4.71 L/100 km
Miles per gallon to liters per 100 kilometers chart
| Miles per gallon (UK, mpg) | Liters per 100 kilometers (L/100 km) |
|---|---|
| 15 | 18.83 |
| 20 | 14.12 |
| 25 | 11.3 |
| 30 | 9.42 |
| 35 | 8.07 |
| 40 | 7.06 |
| 45 | 6.28 |
| Miles per gallon (UK, mpg) | Liters per 100 kilometers (L/100 km) |
|---|---|
| 50 | 5.65 |
| 55 | 5.14 |
| 60 | 4.71 |
| 65 | 4.35 |
| 70 | 4.04 |
| 80 | 3.53 |
| 100 | 2.82 |