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In some countries, e.g. France, alcohol by volume is often referred to as degrees Gay-Lussac (after the French chemist Joseph Louis Gay-Lussac), [5] although there is a slight difference since the Gay-Lussac convention uses the International Standard Atmosphere value for temperature, 15 °C (59 °F).
In particular, alcohol laws set the legal drinking age, which usually varies between 15 and 21 years old, sometimes depending upon the type of alcoholic drink (e.g., beer vs wine vs hard liquor or distillates). Some countries do not have a legal drinking or purchasing age, but most countries set the minimum age at 18 years.
Beer sales in Britain and the Commonwealth are based on multiples of 1 ⁄ 3, 1 ⁄ 2, and full imperial pints. [note 2] Imperial-measure glasses were 568 mL, and metric-measure glasses round up to 570 mL. Beer bottles in the UK were rounded down to 550 mL after standard metrication was introduced in 1995, later changed to 500 mL by January 1 ...
United States standard drinks of beer, malt liquor, wine, and spirits compared. Each contains about 14 grams or 17.7 ml of ethanol. A standard drink or (in the UK) unit of alcohol is a measure of alcohol consumption representing a fixed amount of pure alcohol.
Beer containing no more than 6.0% alcohol by volume may be sold in grocery and convenience stores. Prior to April 1, 2019, the only alcoholic beverage which grocery stores and gas stations were allowed to sell was beer with no more than 3.2% alcohol by weight. Other liquor sales only are allowed at state-licensed retail liquor stores.
Alcohol product labelling could be considered as a component of a comprehensive public health strategy to reduce alcohol-related harm. Adding health labels to alcohol containers is an important first step in raising awareness and has a longer-term utility in helping to establish a social understanding of the harmful use of alcohol.
Thus pure 100% alcohol will have 100×(7 ⁄ 4) = 175 proof, and a spirit containing 40% ABV will have 40×(7 ⁄ 4) = 70 proof. The proof system in the United States was established around 1848 and was based on percent alcohol rather than specific gravity. Fifty percent alcohol by volume was defined as 100 proof. [4]
The UK now uses percentage alcohol by volume (ABV) at 20 °C (68.0 °F), where spirit at 100° proof is approximately 57.15% ABV. In the US, "proof number" is defined as twice the ABV at 60 °F (15.6 °C).