Litres to Gallons Converter
Convert between litres and gallons instantly. Supports both UK (imperial) gallons and US gallons — choose the type that applies to you.
Converter
1 UK gallon = 4.54609 litres (used in the UK and Ireland)
10 litres =
2.1997
UK gallons
UK Gallons
2.1997
US Gallons
2.6417
Quick Reference — Litres to UK Gallons
| litres | UK gallons |
|---|---|
| 1 | 0.22 |
| 2 | 0.4399 |
| 5 | 1.0998 |
| 10 | 2.1997 |
| 20 | 4.3994 |
| 50 | 10.9985 |
| 100 | 21.9969 |
Key Facts
1 UK (imperial) gallon = 4.54609 litres
1 US gallon = 3.78541 litres
UK gallons are about 20% larger than US gallons
Car fuel economy in the UK is measured in miles per gallon (mpg) using imperial gallons
The UK switched from gallons to litres for fuel sales in 1994
UK Gallons vs US Gallons — What Is the Difference?
The gallon is a unit of volume used in both the United Kingdom and the United States, but the two are not the same. The UK (imperial) gallon is defined as exactly 4.54609 litres, while the US gallon is defined as exactly 3.785411784 litres — making the UK gallon approximately 20% larger than its American counterpart.
This difference matters in practical situations. If you are comparing fuel economy figures between a UK car (which quotes miles per imperial gallon) and a US car (which quotes miles per US gallon), you cannot directly compare the numbers without conversion. A car achieving 40 mpg on the UK scale would achieve approximately 33 mpg on the US scale.
In the United Kingdom, petrol and diesel are sold in litres at the pump, but fuel economy is still commonly quoted in miles per gallon (mpg) using the imperial gallon. This is because the mpg figure is familiar to most UK drivers and gives a convenient sense of how far a tank of fuel will take you.
Common Uses for Litres-to-Gallons Conversion
The most common reason people convert between litres and gallons in the UK is fuel. When filling up a car, the pump displays litres, but many drivers still think in terms of gallons. Knowing that a typical family car holds around 50–60 litres (approximately 11–13 UK gallons) helps with budgeting and range planning.
Gardening and agriculture are other common use cases. Watering cans, sprayers, and water butts are often labelled in litres in the UK, but older gardening guides may refer to gallons. Similarly, aquarium keepers frequently need to convert between litres and gallons when following care guides that originate from the United States.