Convert UK Gallons to Liters
Convert UK Gallons to Liters instantly. 1 UK Gallon (gal (UK)) equals 4.5461 Liters (L).
UK Gallons to Liters conversion table
| UK Gallons (gal (UK)) | Liters (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 |
| 20 gal (UK) | 90.9218 L |
| 50 gal (UK) | 227.3045 L |
| 100 gal (UK) | 454.609 L |
| 500 gal (UK) | 2,273.05 L |
| 1,000 gal (UK) | 4,546.09 L |
1 UK Gallon = 4.5461 Liters · multiply UK Gallons by 4.5461
About converting UK Gallons to Liters
UK Gallons (gal (UK)) and Liters (L) are both units of volume, so converting between them is a single multiplication: multiply your UK Gallons figure by 4.5461. Ten UK Gallons comes to 45.4609 Liters, and a hundred works out at 454.609 Liters.
Rule of thumb: going from UK Gallons to Liters multiplies, so the figure always grows — one UK Gallon is already 4.5461 Liters. If your answer came out smaller, you have the conversion the wrong way round.
What is an UK Gallon?
The imperial gallon is defined as exactly 4.54609 liters, but it started as something far more tangible: the volume occupied by ten pounds of water. Britain adopted it in the 1824 reform that swept away a tangle of older gallons — wine, ale and corn measures each had their own — and much of the Commonwealth followed. It is noticeably larger than the US gallon that America retained, so a British car advertised at 50 miles per gallon is genuinely more frugal than an American one quoting the same number. It survives today mainly in fuel-economy figures, since UK forecourts sell petrol by the liter.
What is a Liter?
The liter is not, strictly speaking, an SI unit — it is merely accepted for use alongside SI, and is defined as exactly one cubic decimetre: the volume of a cube ten centimetres on a side. That pedantic status has done nothing to slow it down, since it is how most of the world buys fuel, milk, paint and soft drinks. Both L and l are accepted symbols, but the capital L is preferred in the United States and increasingly elsewhere, because a lowercase l in most typefaces is almost indistinguishable from the digit 1 — a genuine hazard on a dosage label.
To put both in perspective: the UK gallon began as the volume of ten pounds of water, while a large bottle of soda holds two liters.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Liters to UK Gallons converter, or browse all Volume converters.
Frequently asked questions
How many Liters are in one UK Gallon?
There are 4.5461 Liters in one UK Gallon.
How do I convert UK Gallons to Liters?
Multiply the number of UK Gallons by 4.5461. For example, 10 UK Gallons = 45.4609 Liters.
What is 100 UK Gallons in Liters?
100 UK Gallons is equal to 454.609 Liters.
How do I convert Liters to UK Gallons?
Multiply the Liters value by 0.22 (or divide by 4.5461).
Is this UK Gallons to Liters conversion exact?
The definition is exact — UK Gallons and Liters are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is an UK Gallon?
The imperial gallon is defined as exactly 4.54609 liters, but it started as something far more tangible: the volume occupied by ten pounds of water. Britain adopted it in the 1824 reform that swept away a tangle of older gallons — wine, ale and corn measures each had their own — and much of the Commonwealth followed. It is noticeably larger than the US gallon that America retained, so a British car advertised at 50 miles per gallon is genuinely more frugal than an American one quoting the same number. It survives today mainly in fuel-economy figures, since UK forecourts sell petrol by the liter.
What is a Liter?
The liter is not, strictly speaking, an SI unit — it is merely accepted for use alongside SI, and is defined as exactly one cubic decimetre: the volume of a cube ten centimetres on a side. That pedantic status has done nothing to slow it down, since it is how most of the world buys fuel, milk, paint and soft drinks. Both L and l are accepted symbols, but the capital L is preferred in the United States and increasingly elsewhere, because a lowercase l in most typefaces is almost indistinguishable from the digit 1 — a genuine hazard on a dosage label.