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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 ⁄128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.5735295625 mL exactly, or about 4% larger than the imperial unit.
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.
44 ml (1.5 US fl oz) or 43 ml (1.5 imp fl oz) 71 ml (2.5 imp fl oz) In Canada, a "shot" may refer to an official "standard drink" of 1.5 imperial fluid ounces or 42.6 millilitres, [ 11 ] though all establishments serve a "standard drink" of 1 oz. [ 12 ] However, shot glasses available in Canada typically are manufactured according to US fluid ...
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] The fluid ounce is sometimes referred to simply as an "ounce" in contexts where its use is implicit, such as bartending .
Also called a "small peg"; a "large peg" is a double measure of 2 imperial ounces (60 mL). Traditional spirits measure on the Indian subcontinent. 1 ⁄ 4 Gill (Irish) 1 + 1 ⁄ 4 imp fl oz: 35.5 mL: 35 mL: Traditional Irish spirits measure Pony (U.S.) 1.0 US fl oz: 30 mL: Defined as 1 ⁄ 2 of a jigger. [12] Was used to measure a cordial. Pony ...
A "cup" of coffee in the US is usually 4 fluid ounces (118 ml), brewed using 5 fluid ounces (148 ml) of water. Coffee carafes used with drip coffee makers, e.g. Black and Decker models, have markings for both water and brewed coffee as the carafe is also used for measuring water prior to brewing. [5]
Consequently, a fluid ounce of water weighs about 1.041 ounces avoirdupois. 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 ...
Around this time, volume measurements are becoming more precise and the uncertainty is narrowed to between 1–5 mL (0.03–0.2 US fl oz; 0.04–0.2 imp fl oz). [4]: 8 Around the early 17th century, Bonaventura Cavalieri applied the philosophy of modern integral calculus to calculate the volume of any object.