If I add vodka in secondary fermentation, how to use Beersmith to calculate the total ABV?

[Miles_1111]

I am brewing a vanilla stout by adding a vanilla beans soaked vodka at secondary fermentation, which will bring up the ABV. And I am using Beersmith. Can I calcluate the final ABV after adding the vodka in my beer? Thanks.

 

[VikeMan]

This will get you close:

(A1 x V1) + (A2 x V2)
-----------------------
(V1 + V2)

Where:
A1 = Beer ABV
A2 = Vodka ABV
V1 = Beer Volume
V2 = Vodka Volume

 

[bracconiere]

i'd do it by weight. and weight can converted by dividing it by .88 to ABV. or is it just one 8? i forget

 

[Miles_1111]

This will get you close:

(A1 x V1) + (A2 x V2)
-----------------------
(V1 + V2)

Where:
A1 = Beer ABV
A2 = Vodka ABV
V1 = Beer Volume
V2 = Vodka Volume

Ha, that is simple. Thanks!