Want to calculate the alcohol content of your wine. Here is how. Measure the specific gravity of your wine with your hydrometer when you start the kit and mark the number down. Prior to adding the additive packages (Stabilizing) measure the specific gravity again. Subtract the lower number and then multiply this resulting number by 131. This will be your alcohol content.
Initial Specific gravity – 1.085
Stabilizing Specific gravity – 0.996
Difference x 131 = 11.66% Alcohol
Specific gravity must be measured prior to adding an F-pack to the kit as this will increase the specific gravity and give you a false alcohol reading.