UK gallons to litres
Type a value in either box. 1 gal (UK) = 4.54609 L.
Last updated
How to convert
To convert UK gallons to litres, multiply by 4.54609.
L = gal (UK) × 4.54609
For example: 12 gal (UK) × 4.54609 = 54.5531 L.
A UK (imperial) gallon is defined as exactly 4.54609 litres.
In your head: Multiply by 4.5: 10 UK gallons ≈ 45 litres (exactly 45.46 L).
When you’ll need it
Fish tanks, water butts, garden sprayers and hot water cylinders are often sized in gallons. A 30-gallon water butt holds about 136 litres.
Common values
| UK gallons (gal (UK)) | Litres (L) |
|---|---|
| 0.5 gal (UK) | 2.273 L |
| 1 gal (UK) | 4.5461 L |
| 2 gal (UK) | 9.0922 L |
| 3 gal (UK) | 13.6383 L |
| 5 gal (UK) | 22.7305 L |
| 10 gal (UK) | 45.4609 L |
| 12 gal (UK) | 54.5531 L |
| 15 gal (UK) | 68.1913 L |
| 20 gal (UK) | 90.9218 L |
| 50 gal (UK) | 227.3045 L |
| 100 gal (UK) | 454.609 L |
| 1,000 gal (UK) | 4,546.09 L |
Questions
- How many litres are in a UK gallon?
- 1 UK gallon is 4.54609 litres.
- What is the formula to convert UK gallons to litres?
- L = gal (UK) × 4.54609. A UK (imperial) gallon is defined as exactly 4.54609 litres.
- What is 12 UK gallons in litres?
- 12 UK gallons is 54.5531 litres.
- Is a UK gallon the same as a US gallon?
- No. A UK (imperial) gallon is 4.54609 litres, about 20% bigger than a US gallon (3.785 litres). This page uses UK gallons; there is a separate litres to US gallons converter.