Gallons per 100 miles (UK) was commonly used in Britain before metrication and is still referenced for classic cars. For example, a 1960s Morris Minor might average 3 gal/100mi (≈8.5 L/100km), while a modern UK-spec diesel sedan could achieve 2.2 gal/100mi (≈6.2 L/100km). Liters per 100 kilometers (L/100km) is the standard fuel efficiency unit in most countries, especially in Europe. It measures how many liters of fuel a car uses to travel 100 kilometers. A typical compact car averages 5–7 L/100km, while SUVs usually range between 8–12 L/100km. This unit is especially useful when comparing electric or hybrid cars.
To convert between Gallons per 100 Miles (UK) (gal/100mi (UK)) and Liters per 100 Kilometers (L/100km), use the following formulas:
1 Gallons per 100 Miles (UK) (gal/100mi (UK)) = 2.824809363318222 Liters per 100 Kilometers (L/100km)
1 Liters per 100 Kilometers (L/100km) = 0.3540061899346471 Gallons per 100 Miles (UK) (gal/100mi (UK))
2 gal/100mi (UK) = 2 * 2.824809363318222 L/100km = 5.649618726636444 L/100km
2.5 gal/100mi (UK) = 2.5 * 2.824809363318222 L/100km = 7.062023408295555 L/100km
3 gal/100mi (UK) = 3 * 2.824809363318222 L/100km = 8.474428089954666 L/100km
3.5 gal/100mi (UK) = 3.5 * 2.824809363318222 L/100km = 9.886832771613776 L/100km
4 gal/100mi (UK) = 4 * 2.824809363318222 L/100km = 11.299237453272887 L/100km
| Gallons per 100 Miles (UK) (gal/100mi (UK)) | Liters per 100 Kilometers (L/100km) |
|---|---|
| 1.5 gal/100mi (UK) | 4.237214044977333 L/100km |
| 2 gal/100mi (UK) | 5.649618726636444 L/100km |
| 2.5 gal/100mi (UK) | 7.062023408295555 L/100km |
| 3 gal/100mi (UK) | 8.474428089954666 L/100km |
| 3.5 gal/100mi (UK) | 9.886832771613776 L/100km |
| 4 gal/100mi (UK) | 11.299237453272887 L/100km |
| 5 gal/100mi (UK) | 14.12404681659111 L/100km |
| 6 gal/100mi (UK) | 16.94885617990933 L/100km |