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The US fluid ounce is based on the US gallon, which in turn is based on the wine gallon of 231 cubic inches that was used in the United Kingdom prior to 1824. With the adoption of the international inch, the US fluid ounce became 1⁄128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.5735295625 mL exactly, or about 4% larger than the imperial unit.
236.588 mL. The cup is a cooking measure of volume, commonly associated with cooking and serving sizes. In the US, it is traditionally equal to one-half US pint (236.6 ml). Because actual drinking cups may differ greatly from the size of this unit, standard measuring cups may be used, with a metric cup being 250 millilitres .
In Canada, a teaspoon is historically 1⁄6 imperial fluid ounce (4.74 mL) and a tablespoon is 1⁄2 imperial fl oz (14.21 mL). In both Britain and Canada, cooking utensils come in 5 mL for teaspoons and 15 mL for tablespoons, hence why it is labelled as that on the chart. The volumetric measures here are for comparison only.
For nutritional labeling and medicine in the US, the teaspoon and tablespoon are defined as a metric teaspoon and tablespoon—precisely 5 mL and 15 mL respectively. [21] The saying, "a pint's a pound the world around", refers to 16 US fluid ounces of water weighing approximately (about 4% more than) one pound avoirdupois.
A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl.) is a unit of volume. An imperial fluid ounce is defined in British law as 28.4130625 millilitres , [ 15 ] a US customary fluid ounce is 29.57353 mL, [ 16 ] and a US food labelling fluid ounce is 30 mL. [ 17 ]
SI derived unit. 550.610 471 mL (dry) The pint ( / ˈpaɪnt /, listen ⓘ; symbol pt, [ 1][ 2] sometimes abbreviated as p[ 3]) is a unit of volume or capacity in both the imperial and United States customary measurement systems. In both of those systems it is traditionally one eighth of a gallon.
In the 18th century, the table-spoon became an unofficial unit of the apothecaries' system of measures, equal to 4 drams ( 1 / 2 fl oz, 14.8 ml). It was more commonly known by the Latin name cochleare majus (abbreviated cochl. maj.) or, in apothecaries' notation, f℥ss or f℥ß (fluid ℥, i.e. ounce, semis, one-half).
Dram (unit) The dram (alternative British spelling drachm; apothecary symbol ʒ or ℨ; [ a] abbreviated dr) [ 4][ 5]: C-6–C-7 [ 6] is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system. [ 5] It was originally both a coin and a weight in ancient Greece. [ 7]