How to convert litres to UK gallons
UK gallons = litres × 0.219969 · US gallons = litres × 0.264172
For example, a 50 litre fuel tank holds 50 × 0.219969 = 11 UK gallons (13.2 US gallons).
Litres to UK gallons conversion table
| Litres (L) | UK gallons (gal) |
|---|---|
| 1 | 0.22 |
| 2 | 0.44 |
| 4.55 | 1 |
| 5 | 1.1 |
| 10 | 2.2 |
| 20 | 4.4 |
| 25 | 5.5 |
| 30 | 6.6 |
| 40 | 8.8 |
| 45 | 9.9 |
| 50 | 11 |
| 55 | 12.1 |
| 60 | 13.2 |
| 70 | 15.4 |
| 80 | 17.6 |
| 100 | 22 |
UK gallons and US gallons
A UK (imperial) gallon is 4.546 litres. A US gallon is 3.785 litres, about 17% smaller. That is why the same car shows a higher mpg figure in the UK than in America. All UK fuel economy figures use the imperial gallon, even though fuel is sold by the litre.
Fuel and mpg
To work out your car's real mpg from the litres you put in, use the MPG calculator. To price a journey, use the fuel cost calculator.
Sources
Rates and rules last checked 15 October 2026. These figures are a guide. For a decision that matters, confirm with the official source.