In this video we explain the proper usage of a hydrometer. A hydrometer is a tool that measures the density of a liquid as compared to water and is an important part of home brewing. Calculations made using a hydrometer can tell you the alcohol by weight and the alcohol by volume of your beer. Hydrometers are easy to use and read and take only a minimal amount of practice. The math for calculating the alcohol of your beer is aso included in this video. Check us out online at theamericanbrewer.com for all your home brew needs. We offer the lowest prices in America on home brew supplies and ship anywhere in the world!