# Home Brew Enthusiasts Group Information Group Forum Group Discussions % Alco

Discussion in 'Home Brew Enthusiasts' started by chrisboyo, Nov 4, 2015.

1. ### chrisboyo

Joined:
Aug 5, 2009
Messages:
1,338
825
Location:
Newport South Wales
How can I tell the Alco % of my wine ?

2. ### pappajohnFunsterLife Member

Joined:
Aug 26, 2007
Messages:
30,392
18,082
Location:
YO11 2BD

Surely a hydrometer will show gravity which should relate to alcohol content

• Like it x 1
3. ### Ralph-n-BevFunster

Joined:
Nov 30, 2009
Messages:
6,109
9,518
Location:
Wrenthorpe, Wakefield.
Ralph's got a thermometer looking thing . He puts some brew in a test tube thing and drops the thermometer thing in it. Depending on how it sits in the brew = how strong it is.
I just drink it !

• Like it x 1
4. ### DBKFunster

Joined:
Jan 9, 2013
Messages:
9,234
12,882
Location:
Plympton, Devon
You need a hydrometer, you get different ones for beer and wine.

Then use it before fermentation, it essentially measures the amount of sugar and from that can calculate how much can be turned to alcohol. There will be a scale on the side of the hydrometer showing percentage alcohol.

To be really accurate take a reading at the end of fermentation and subtract from the first reading before fermentation.

Joined:
Nov 30, 2009
Messages:
566
2,016
Location:
Spain/Portugal
Take a "before fermentation" reading and log it down (original gravity)
Then take "after" fermentation reading (final gravity)

Take the before from the after and X's by 1.25 this will give the %ABV

for example I have just kegged a beer that was

1.065 before
1.010 after

1.065-1.010 = 55 times by 1.25 = 6.8% ABV

you can get "more accurate" calculators here for instance (its not a linear scale) my example then comes out at 7.22%

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

Last edited: Nov 4, 2015
• Like it x 3
6. ### DBKFunster

Joined:
Jan 9, 2013
Messages:
9,234
12,882
Location:
Plympton, Devon
Which is why I suggested just reading the % directly off the stem, assuming it is written on it, as this takes into account the non-linearity. But as you suggest it isn't an exact science otherwise you would have to take into account temperature.

My scale is: fall over after two pints - too strong. Still upright after ten, too weak. Anything in between is fine.

• Like it x 2
7. ### LarrynwinFunster

Joined:
Feb 22, 2008
Messages:
9,079
14,468
Location:
Norfolk
Quite a good chassis

Joined:
Nov 30, 2009
Messages:
566