THE HYDROMETER
Fermentation Finished

Fermented hydrometer degrees divided by 8 = % volume of alcohol.

Fermentation finished

Starting hydrometer degrees
Finished hydrometer degrees
Total fermented hydrometer degrees

1059
980
 79

 

79 divided by 8 = about 10% alcohol by volume

159
900
1 059 grammes

59 grammes = 1059 hydrometer degrees

80
900
980 grammes

980 grammes = 980 hydrometer degrees (specific gravity)