Is Proof the Same as Volume in Alcoholic Beverages?
                                
                                
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                                    3 min read                                
                            
                                According to the Alcohol and Tobacco Tax and Trade Bureau (TTB), the United States defines proof as twice the percentage of alcohol by volume (ABV). While the two measurements are intrinsically linked, proof is not the same as volume; instead, it is a way of expressing the concentration of alcohol within a given volume of liquid.