UK Gallons to Liters Converter

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Convert UK imperial gallons to liters at the exact factor 1 UK gallon = 4.54609 L. A 5-gallon UK jerrycan holds 22.73 L; a 50-mpg-UK car needs 22.73 L per 50 miles. Use this when British fuel-economy quotes need to feed into a metric trip-cost calculator. The UK gallon is about 20 % larger than the US gallon (3.785 L). Browser-local.

Gallon (UK)
Liter (L)

Gallon (UK) → Liter (L)

Quick reference table

Gallon (UK)Liter (L)
1 gal (UK)4.5461 L
2 gal (UK)9.0922 L
5 gal (UK)22.7305 L
10 gal (UK)45.4609 L
25 gal (UK)113.6523 L
50 gal (UK)227.3045 L
100 gal (UK)454.609 L

Glossary

UK (imperial) gallon

A UK imperial gallon is exactly 4.54609 L or 277.4194 cubic inches — about 20 % larger than the US gallon (3.785 L). Used in the United Kingdom and a few Caribbean countries for fuel economy figures (miles per UK gallon) and historical recipes. One UK imperial gallon equals 8 UK pints or 160 UK fluid ounces.

Liter (L)

A liter is the standard metric unit of volume, equal to 1 cubic decimeter (1 L = 1000 ml = 0.001 m³). It is used worldwide for beverages, fuel sold in metric markets, kitchen recipes and small-scale chemistry. One US gallon holds about 3.785 L; one UK imperial gallon holds about 4.546 L. The symbol is "L" or "l" (capital L preferred to avoid confusion with the digit 1).

Metric / SI volume

In the metric system, volume is reported in liters (everyday) or cubic meters (industrial), with millilters for fine resolution. The relations are exact powers of ten: 1 m³ = 1,000 L = 1,000,000 ml, and 1 ml = 1 cm³. The metric system is the standard worldwide for science, beverages, fuel in metric countries, and most modern recipes outside the United States.

Imperial / US Customary volume

US customary and UK imperial systems both use gallon, quart, pint and fluid ounce — but with different sizes. The US gallon is 3.785 L (128 US fl oz); the UK imperial gallon is 4.546 L (160 UK fl oz). Cooking units (tsp = 4.93 ml, tbsp = 14.79 ml, cup = 240 ml) follow the US standard in nearly all modern English-language recipes.

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