What is the differences in a UK gallon compared to a US gallon?

Answer 1

The Imperial gallon (4.546 09 litres (L)) and bushel (36.368 72 L) are, respectively, 20% and about 3% larger than the United States liquid gallon (3.785411784 L) and bushel (35.23907016688 L). The Imperial gallon was originally defined as the volume of 10 avoirdupois pounds of water under specified conditions, and the Imperial bushel was defined as 8 Imperial gallons.

Also, the subdivision of the Imperial gallon as presented in the table of British apothecaries' fluid measure differed in two important respects from the corresponding United States subdivision, in that the Imperial gallon was divided into 160 fluid ounces (whereas the United States gallon is divided into 128 fluid ounces), and a "fluid scruple" is included.

As noted above, in the customary British system the units of dry measure are the same as those of liquid measure. In the United States these two are not the same, the gallon and its subdivisions are used in the measurement of liquids; the bushel, with its subdivisions, is used in the measurement of certain dry commodities. The U.S. gallon (3.785 411 784 L) is divided into four liquid quarts (946.352 946 mL each) and the U.S. bushel (35.239 070 166 88 L) into 32 dry quarts (1.101 220 942 715 L each) or 4 pecks (8.809 767 541 72 L each). All the units of capacity or volume mentioned thus far are larger in the Imperial system than in the U.S. system (by about 20% for wet measures). But the British fluid ounce is smaller than (about 96% of) the U.S. fluid ounce, because the British quart is divided into 40 fluid ounces whereas the U.S. quart is divided into 32 fluid ounces.

From this we see that, in the Imperial system, an avoirdupois ounce of water at 62 °F has a volume of one fluid ounce, because 10 pounds is equivalent to 160 avoirdupois ounces, and 1 Imperial gallon is equivalent to 4 Imperial quarts, or 160 fluid ounces. This convenient relation does not exist in the U.S. system because a U.S. gallon of water at 62 °F weighs about 8 1/3 pounds, or 133 1/3 avoirdupois ounces, and the U.S. gallon is equivalent to 4 × 32, or 128 fluid ounces.


Comparison of Imperial and U.S. volume measures 1 U.S. fluid ounce = 29.573 529 562 5 mililitres ≈ 1.041 Imperial fluid ounces
1 Imperial fluid ounce = 28.413 062 5 mililitres ≈ 0.961 U.S. fluid ounce
1 liquid U.S. gallon = 3.785 411 784 litres ≈ 0.833 Imperial gallon
1 Imperial gallon = 4.546 09 litres ≈ 1.201 liquid U.S. gallons
1 dry U.S. gallon = 4.404 842 803 2 litres ≈ 0.968 Imperial gallon
1 Imperial gallon = 4.546 09 litres ≈ 1.032 dry U.S. gallons

Answer 2

UK Gallon = 4.540 Litres
US Gallon = 3.378 Litres

Answer 3

uk gallon known as imperial gallon.

Answer 4

US Gallon is 3.785 litres whereas UK Gallon is 4.55 litres

Answer 5

1 Gallon US = 0.832674 Gallon UK

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Answer 6

It costs a lot less,it is less but even so tax wise it in comparison it just shows, what a robber Mr G Brown is !

Answer 7

About £3.50!! Polluting b*stards!

Answer 8

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