Vodka proof is a measurement of the alcoholic content of vodka, usually expressed as a percentage or a number followed by the word “proof.” In the United States, proof is defined as twice the percentage of alcohol by volume (ABV). So, for example, a vodka that is 40% ABV would be 80 proof.
The term “proof” dates back to the 18th century, when British sailors would test the alcoholic content of their rum by igniting it with gunpowder. If the rum was strong enough to ignite the gunpowder, it was considered “proof” that it contained a high enough alcohol content to be considered safe for consumption.
Today, the term “proof” is used mainly in the United States, while other countries typically use only the ABV measurement. However, some vodka brands may still use the proof measurement on their labels, particularly if they are targeting the American market.
It’s important to note that the alcohol content of vodka can vary widely depending on the brand and the country of origin. In general, most vodkas range from 35% to 50% ABV (70 to 100 proof), although some specialty vodkas can have even higher alcohol content. It’s always a good idea to check the label or ask the bartender or retailer for information on the alcohol content of the vodka you are consuming.