How to convert miles per imperial gallon to liters per 100 kilometers
Formula: L/100 km = 282.481 ÷ mpg (UK)
Worked example: 45 mpg (UK) → 282.481 ÷ 45 = 6.27735 L/100 km
For imperial gallons, divide 282.481 by the mpg value. A UK rating of 50 mpg equals 5.65 L/100 km.
Miles per imperial gallon to liters per 100 kilometers conversion chart
| Miles per imperial gallon (mpg (UK)) | Liters per 100 kilometers (L/100 km) |
|---|---|
| 15 mpg (UK) | 18.8321 L/100 km |
| 20 mpg (UK) | 14.124 L/100 km |
| 25 mpg (UK) | 11.2992 L/100 km |
| 30 mpg (UK) | 9.41603 L/100 km |
| 35 mpg (UK) | 8.07088 L/100 km |
| 40 mpg (UK) | 7.06202 L/100 km |
| 45 mpg (UK) | 6.27735 L/100 km |
| 50 mpg (UK) | 5.64962 L/100 km |
| 55 mpg (UK) | 5.13602 L/100 km |
| 60 mpg (UK) | 4.70802 L/100 km |
| 70 mpg (UK) | 4.03544 L/100 km |
What is a mile per imperial gallon?
UK mpg use the imperial gallon of 4.546 liters, 20% larger than the US gallon. The same car therefore shows a higher figure in Britain: 40 UK mpg is only about 33 US mpg.
What is a liter per 100 kilometers?
Liters per 100 kilometers measure how much fuel a vehicle burns over a fixed distance. Europe, Canada and Australia use it on window stickers. Lower is better, and fuel cost scales directly with it: a car at 5 L/100 km burns half as much as one at 10.