A hydrometer is a tool used to measure the specific gravity (SG) of a liquid. For wine and beer makers, it helps determine the sugar content of a liquid, which can be used to estimate alcohol levels and track fermentation progress.
Use the specific gravity (SG) to estimate the potential alcohol content. The formula is:
Potential Alcohol (%) = (OG - FG) × 131.25
Where:
This formula provides an estimate of the alcohol content based on the sugar consumed during fermentation.
Learn more about hydrometer usage: