The gallon is a unit of measurement for measuring the capacity of the liquid. It is used in US and British Empire measurement systems. There are three different gallon sizes used today. The imperial gallon is 4.54 liters and common in Commonwealth states and some Caribbean nations. The US gallon is about 3,785 liters and common in the United States and Latin America. The US dry gallon is about 4,405 Liters or 1⁄8 US bushel.

The imperial gallon

The imperial or UK gallon is a unit of measure with exactly 4.54609 liters or 277.42 cubic inches. It is common in Commonwealth countries and some Caribbean states. The imperial gallon was initially based on 10 pounds which translates into 4.54kg of water at 17 ° C. The imperial fluid ounce weighs 1⁄160 of the imperial gallon. An imperial gallon is divided into four rooms, each room consists of two pints, and each pint consists of imperial fluid ounces.

US liquid gallon

An American gallon is defined as 3,7854 liters or 231 cubic inches. At 62 ° F (17 ° C), one gallon of US liquid water equals 3.78 kg or 8.34 pounds. It is 16.6% lighter compared to the imperial gallon. However, just like the imperial gallon, a US gallon is divided into four quarters, each quarter is divided into two pints and each liter contains 16 US liquid ounces. Therefore, 128 US liquid ounces are required to fill one US liquid gallon. It is common to specify the temperature at which the material will weigh or occupy a certain volume. This is done to overcome the change in volume or mass resulting from the temperature change. In the US, the weight of alcohol and petroleum products is set to 60 ° F (16 ° C).

US Dry Gallon

The American dry gallon is equal to one eight from Winchester bushel, 268.8025 cubic inches or 4.4.5 liters.

Gallon 1 [Fluid, USA] = 3.7854118 Liters

1 Gallon [Dry, USA] = 4.4048838 Liters

1 Gallon [UK] = 4.54609 Liters

Global use of gallons

The imperial gallon was used in the United Kingdom until 1994. Fuel economy, in particular, operated in gallons in Canada, the United Kingdom, and the US. Directive EU 80/181 / EEC, issued on December 31, 1994, barred the continued use of gallon for trading and official purpose in favor of the liter. However, the gallon can still be used as a secondary unit of measurement. On September 30, 1995, the United Kingdom amended its legislation and adopted the liter. Several Caribbean and South American states are still using the gallon. In 2010, the United Arab Emirates adopted the use of liter and began selling petroleum products in liters. In 2015, the states of Antigua and Barbuda also changed to the liter.