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How to count alcohol %?

Discussion in 'Beginners Beer Brewing Forum' started by TheBrewers, Mar 2, 2012.

 

  1. #1
    TheBrewers

    Member

    Posted Mar 2, 2012
    OG : 1.068
    FG : 1.015

    Today I drank it:tank: and now kind of :drunk: taste is good but i shouldn't be easily :drunk:. How much % is this? Thanks

    Doreen:mug:
     
  2. #2
    jaytizzle

    Well-Known Member

    Posted Mar 2, 2012
    The forumla I've seen is
    (OG-FG)*131.25

    So for you you've got
    (1.068 - 1.015) * 131.25 = 6.96%
     
  3. #3
    lurker18

    Well-Known Member  

    Posted Mar 2, 2012
    You posted here, so you obviously have internet access. Google ABV calculator and punch in the numbers.

    Personally I use http://www.rooftopbrew.net/abv.php lets you adjust for temperature, and can't be any easier to use.
     
    mpenn35 likes this.
  4. #4
    Jayhem

    Well-Known Member

    Posted Mar 2, 2012
    7% ABV. Yea that is like drinking 2 bottles of miller/bud.
     
  5. #5
    masonsjax

    Well-Known Member  

    Posted Mar 2, 2012
    Most reliable way is to start with 15, drink a beer, subtract one, repeat. Whatever the number is when you wake up is the approximate ABV.
     
    Jayhem and JRapp like this.
  6. #6
    Just-a-Guy

    Well-Known Member

    Posted Mar 2, 2012

    Science. It's a beautiful thing. !!
     
  7. #7
    TheBrewers

    Member

    Posted Mar 3, 2012
    jaytizzle: Thanks.. Drunk badly last night after 2 bottle of 660ml
    lurker18: 7.1% ABV?? No wonder... Thanks
    Jayhem: Yeah... around there... Thanks
    masonsjax: :confused:
    Just-a-Guy: What's that mean?

    Thanks

    Doreen :mug:
     
  8. #8
    jsherlock22

    Active Member

    Posted Mar 3, 2012
    I will remember this nugget of wisdom for life.
     
  9. #9
    kscarrington

    Well-Known Member

    Posted Mar 3, 2012
    Hahaha - nice!

     
  10. #10
    likwidbliss

    Well-Known Member

    Posted Mar 3, 2012
    1 ABV hahaha!
    2 ABV hahaha!
    3 ABV hahaha!
    4 ABV hahaha!
    5% ABV hahaha ...burp!
    6% ABV hahaha :drunk:
     
  11. #11
    william_shakes_beer

    Well-Known Member

    Posted Mar 3, 2012
    The Real real answer is send it to a lab, but nobody ever does that. The real answer is plug Og and FG ito na table similar to the one published in How to Brew. I did a table reverse engineering the Og and FG numbers to calculate the multi[lier and got OG-FG *133% fairly consistently.
     
  12. #12
    TheBrewers

    Member

    Posted Mar 4, 2012
    :confused:
     
  13. #13
    unionrdr

    Homebrewer, author & air gun shooter  

    Posted Mar 4, 2012
    I use the Cooper's formula of (OG-FG)/7.46 + .5 = ABV%. So by this one,it'd be 7.6%.:drunk::ban:
     
  14. #14
    NordeastBrewer77

    NBA Playa  

    Posted Mar 4, 2012
    abv= OG - FG x 131.25

    that equation will get you a good estimate of ABV, to now exactly, you need a lab. there's also a million and two online calculators that will tell you your ABV based on original and final gravities.
     
  15. #15
    lamppa

    Well-Known Member

    Posted Mar 4, 2012
    this is a great webiste with an easy abv calculator with a temp correction for hydrometer (nice for brewday testing too)

    the formula is correct ( OG - FG = points converted to ETOH X .131 = ABV)

    http://www.rooftopbrew.net/abv.php
     
  16. #16
    unionrdr

    Homebrewer, author & air gun shooter  

    Posted Mar 4, 2012
    What bothers me the most is not that there's some 8 different calculators out there. But that they each give a different answer. Cooper's being the highest. Judging from my body's reactions to the ales involved,I'd say it's pretty close! :tank:
     
  17. #17
    jamoke

    Well-Known Member

    Posted Mar 4, 2012
    Gotta love the simple, eloquent, and easy to implement formulas.

    Cheers to you sir! :mug:
     
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