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  • Hydrometer calculator

    From Des@desotuatail@aol.com to alt.beer.home-brewing on Mon Apr 4 04:33:59 2011
    From Newsgroup: alt.beer.home-brewing

    Hi I am trying to work out alcohol content. On my hydrometer at the
    40
    point it 6.5%. This means if it dropped to 1.000 then the alcohol
    content would be 6.5%. Obviously it would not go that low. With wine
    It does go below this value. I wanted to work out the alcohol content
    for this but the Hydrometer does not display below 5%.

    If the Starting value of the wine is 1.080 (12.8%) and it goes below
    1.000 then the alcohol content would I asume be higher. Is there a
    calculation that I could use. There are websites that can adjust
    readings for temprature adjustment but not a SG to alcohol
    conversion.


    TIA


    Desmond.


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  • From 1laripu@1laripu@gmail.com to alt.beer.home-brewing on Thu Jul 3 09:54:37 2014
    From Newsgroup: alt.beer.home-brewing

    On Monday, April 4, 2011 7:33:59 AM UTC-4, Des wrote:

    If the Starting value of the wine is 1.080 (12.8%) and it goes below
    1.000 then the alcohol content would I asume be higher. Is there a calculation that I could use. There are websites that can adjust
    readings for temprature adjustment but not a SG to alcohol
    conversion.

    An easy one, accurate to within a about 0.2%.
    Alcohol by volume = (OG - FG)*131.25 (OG = original gravity, FG = final gravity)
    Example 1: Wine. OG=1.080, FG=0.995 Alcohol by volume = (1.080-0.995)*131.25 = 11.2% ± 0.2% so the actual alcohol is somewhere between about 11% and 11.4%.
    Example 2: Beer. OG=1.050, FG=1.010 Alcohol by volume = (1.050-1.010)*131.25 = 5.25% ± 0.2% so around 5 to 5.4%.
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