Alcohol calculation with chaptalisation

[qyhcat]

How do I calculate alcohol when the process has chaptalisation?

Do I add the difference in SG after sugar addition to the start SG and do the math OR do I calculate separately the two deltas? IF separately, do I just add them up afterwards?

thanks

 

[jamesngalveston]

http://www.brewersfriend.com/chaptalization-calculator/

 

[LeChat]

Given that James did not answer the question ( ), I will go ahead and say that the SG scale, or Brix for that matter, is linear.

As long as you measure the difference between the highest SG and lowest SG after fermentation, you will have an accurate idea of the alcohol % in the final wine. If you add sugar during active fermentation, you would need to calculate the difference in SG caused by the addition of sugar and add this to your initial SG for an accurate reading.

 

[turkeylipz]

http://www.winemakingtalk.com/forum/showpost.php?p=487793

Don't forget to adjust the liters of must for how much you increase via simple syrup.

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