Beer - how many grams of alcohol?
#1
FitDay Member
Thread Starter
Join Date: Jul 2010
Posts: 5
Beer - how many grams of alcohol?
I'm not 100% on how to calculate the total grams of alcohol in a beer.
I would make an assumption that if a beer is 3.9% alcohol by volume, then take the total weight in grams of the beer, and multiply by 3.9% to determine the grams. Is this correct?
The low calorie/carb beers don't list that on their nutrition label.
I would make an assumption that if a beer is 3.9% alcohol by volume, then take the total weight in grams of the beer, and multiply by 3.9% to determine the grams. Is this correct?
The low calorie/carb beers don't list that on their nutrition label.
#2
FitDay Member
Join Date: Feb 2010
Location: San Francisco, CA
Posts: 576
Alternately, and this is what I do, you can multiply 3.9% by the total volume of the beer (355mL for a standard bottle I think), to get the volume of pure alcohol. Then multiply this by the density of ethanol, 0.789 g/mL, to get grams of alcohol.
To make things easier, you can shorten this if you only drink beer from the common 355mL bottles: just multiply the alcohol percentage by 280 (roughly .789 * 355) to get your alcohol grams. This works best for me since the alcohol in the beer I drink ranges from 4 - 10%
To make things easier, you can shorten this if you only drink beer from the common 355mL bottles: just multiply the alcohol percentage by 280 (roughly .789 * 355) to get your alcohol grams. This works best for me since the alcohol in the beer I drink ranges from 4 - 10%