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Using a hydrometer, the specific gravity (SG) of the wine is measured before and after fermentation. The numbers are then used in the following formula to calculate Alcohol By Volume. ABV = (initial SG - final SG) / 7.36

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Q: How is the ABV on a bottle of wine calculated?
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How many ml in a wine glass?

120 milliliters (about 4 ounces) is a standard serving of wine. In the U.S., standard drinks are 12 oz. of beer (5% alcohol by volume), five ounces of wine (12% alcohol), and 1.5 oz. of distilled spirits (80 proof or 40% alcohol). Each standard drink contains about .6 oz. of absolute alcohol. Converting fluid ounces to milliliters generates the answer for each form of standard drink: about 150 for wine, about 360 for beer and about 45 for distilled spirits.


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