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.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.