Litres to UK Gallons Converter
Convert litres to imperial gallons — 4.546 litres to the UK gallon. Results update as you type; exact factors shown.
One litre is 0.22 imperial gallons — see the exact factor, not a rounded rule of thumb.
How the litres to uk gallons converter works
Volumes convert through the litre (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common volume conversions
| From | To | Units |
|---|---|---|
| 1 L | 0.22 imp gal | litre to imperial gallons |
| 5 L | 1.0998 imp gal | litres to imperial gallons |
| 10 L | 2.1997 imp gal | litres to imperial gallons |
| 20 L | 4.3994 imp gal | litres to imperial gallons |
| 25 L | 5.4992 imp gal | litres to imperial gallons |
| 40 L | 8.7988 imp gal | litres to imperial gallons |
| 45 L | 9.8986 imp gal | litres to imperial gallons |
| 50 L | 10.9985 imp gal | litres to imperial gallons |
| 60 L | 13.1982 imp gal | litres to imperial gallons |
| 100 L | 21.9969 imp gal | litres to imperial gallons |
| 200 L | 43.9938 imp gal | litres to imperial gallons |
| 500 L | 109.9846 imp gal | litres to imperial gallons |
Units in this converter and their exact factors
| Unit | Symbol | One unit in litres |
|---|---|---|
| millilitre | mL | 0.001 litre |
| litre | L | 1 litre |
| cubic metre | m³ | 1,000 litre |
| teaspoon (metric) | tsp | 0.005 litre |
| tablespoon (metric) | tbsp | 0.015 litre |
| cup (metric) | cup | 0.25 litre |
| US fluid ounce | US fl oz | 0.0295735296 litre |
| US cup | US cup | 0.2365882365 litre |
| US pint | US pt | 0.473176473 litre |
| US gallon | US gal | 3.785411784 litre |
| imperial fluid ounce | imp fl oz | 0.0284130625 litre |
| imperial pint | imp pt | 0.56826125 litre |
| imperial gallon | imp gal | 4.54609 litre |
| cubic foot | ft³ | 28.316846592 litre |
FAQFrequently asked questions about volume conversion
How many litres in a UK gallon?
4.54609.
How is that different from a US gallon?
The US gallon is 3.785 litres, about 17% smaller.
What is 50 litres in UK gallons?
11 gallons.
Why the difference?
Britain redefined its gallon in 1824 as ten pounds of water; the US kept the older wine gallon.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.