The alcohol content of drinks depends on their strength and volume. Alcoholic beverages vary considerably in terms of strength and the volumes of the most commonly used containers. It is therefore important to apply the quantity of beverages to the units of volume that are most common and to take into account a person's average consumption of absolute alcohol per occasion.
The alcohol content of a single serving of alcohol can also be measured in terms of ethyl alcohol. This allows any amount of alcohol to be converted into grams. One milliliter of ethyl alcohol contains 0.79 grams of absolute (100%) alcohol.
For example:
1 can of beer (330 ml) at 5% strength x 0.79 (conversion factor) = 13 grams of absolute alcohol:
alcohol content= (330×5):100=16.5 g; quantity of absolute alcohol=16.5×0.79=13 g
1 glass of wine (140 ml) at 12% alcohol x 0,79 = 13,3 g of absolute alcohol:
alcohol content= (140×12):100=16.8 g;
absolute alcoholic strength=16,8×0,79=13,3 g
1 sip of spirit (40 ml) at 40% strength x 0,79 = 12,6 g of absolute alcohol:
alcohol content= (40×40):100=16.0 g;
quantity of absolute alcohol=16,0×0,79=12,6 g