I’m trying to figure out how to calculate ABV when staggering additional sugar during fermentation (to keep the ferment going longer and get a higher ABV).
Can I just add it up?
For example, assume my batch started at 1.060
A few days later it’s at 1.030 and I add sugar to bring it back up to 1.060
Assuming it finishes at 1.020, can I add the extra 0.030 to my original gravity and calculate it as 1.090 - 1.020 x 131 to get a correct ABV, or does the math no longer work since I messed with the process?