<Dl> <Dd> P u r e a l c o h o l m a s s = v o l u m e × (a l c o h o l b y v o l u m e × v o l u m e t r i c m a s s d e n s i t y) (\ displaystyle Pure \ alcohol \ mass = volume \ \ times \ (alcohol \ by \ volume \ \ times \ volumetric \ mass \ density)) </Dd> </Dl> <Dd> P u r e a l c o h o l m a s s = v o l u m e × (a l c o h o l b y v o l u m e × v o l u m e t r i c m a s s d e n s i t y) (\ displaystyle Pure \ alcohol \ mass = volume \ \ times \ (alcohol \ by \ volume \ \ times \ volumetric \ mass \ density)) </Dd> <P> For example, 0.35 litre glass of beer with ABV of 5.5% has 15.2 grams of pure alcohol . Pure alcohol has density of 789.24 g / l (at 20 ° C). </P> <Dl> <Dd> 0.35 l × (0.055 × 789.24 g / l) ≈ 15.2 g (\ displaystyle 0.35 \ l \ times \ (0.055 \ \ times \ 789.24 \ g / l) \ approx 15.2 g) </Dd> </Dl>

How many gram of alcohol in a beer