ABV question

[mtg4772]

(Final-original gravity) x 131= ABV. Right? Well according to Charlie Papazians book "joy of home brewing" the multiplication figure is 105. Which is correct? Online calculators seem to be using the 131 figure.

 

[homebrewdad]

(Final-original gravity) x 131= ABV. Right? Well according to Charlie Papazians book "joy of home brewing" the multiplication figure is 105. Which is correct? Online calculators seem to be using the 131 figure.

I have only seen 131 (or, sometimes, 131.25) used... for whatever that is worth.

 

[JonK331]

It's actually ((OG-FG)*131). I use 131 as well.

 

[mtg4772]

It's actually ((OG-FG)*131). I use 131 as well.

Yeah, (OG-FG)x131=ABV

 

[mtg4772]

I'm not sure why Mr. Papazian is using the 105 figure. I'll have to write and ask him.