Call me stupid but

[marko]

I have just bottled my EDME stout and it is reading at 1.014 as a final gravity, it started at 1.035, how do i know what the ABV is, i have tried using the calculators on this site but struggled. Could anyone help please.

[Dill]

Hello Stupid (well you did say call you stupid) your abv is about 3.3 abv according to my calculations

[marko]

To get full marks you have to show your working out.

Mark (stupid)

[Dill]

Mark i've had a few too many tonight to explain how to work it out but her's a simple calculator for you to try.
Just type in your original gravity which was 1035 and the type inyour fg which was 1014 and hey presto you should get 3.3%

Click Here

[DrZiggy]

Hello Stupid (well you did say call you stupid) your abv is about 3.3 abv according to my calculations

out of intrest what formula are you using ? I have always used - Starting g - final g / 7.4

hence 1035-1014 = 21

21 / 7.4 = 2.83 % alchool...

am I going wrong somewhere ??

[marko]

this is the problem i am having DrZiggy, thats why i asked the question. every place i check my results are different

[mope]

You need to add 0.5 - I think it accounts for the priming sugar.

[Dill]

You need to add 0.5 - I think it accounts for the priming sugar.

Thats correct (I think) I know you need to add something, but like I said im a bit too far gone to remeber the exact working out. But that calculator that I posted the lnk to should be bang on

[Dill]

Let’s try it,

SG – FG / 7.4 + 0.5

(Sg) 1035 - (fg)1014 = 21
21 / 7.4 = 2.83
2.83 + 0.5 = 3.3

Yep same as the calculator

[mope]

To quote Coopers Brew Instructions:

Approx % alcohol by volume (ABV) = ((OG-GF)/7.46) + 0.5

0.5% is added to reflect the addition of priming sugar for secondary fermentation

[DrZiggy]

You need to add 0.5 - I think it accounts for the priming sugar.

nope lost myself now
just googled and found the follwoing page:
http://drunkmansguide.wordpress.com/200 ... your-beer/

so using that equation it still works out at 2.75

which is probably more correct as the formula I use should divide by 7.36 I just round up as it's more fun.

I can't see Prming sugar having that huge an effect on alchool content as I thought most of it turned to Co2 and alchool was produced during the FV as thats where the Yeast is at....

Any mathamatical chemist's in the building ??

[Dill]

You need to add 0.5 - I think it accounts for the priming sugar.

I can't see Prming sugar having that huge an effect on alchool content as I thought most of it turned to Co2 and alchool was produced during the FV as thats where the Yeast is at....

The co2 is produced from the yeast eating sugar and turning it into alcohol whether it’s in bottle, keg or fv. Co2 =yeast farts. It’s just when it’s in bottle or keg it doesn’t escape thus causing carbonisation.

[mope]

It seems they are essentially the same equation, with the exception one makes a correction for ethonol production during secondary fermentation.

I wouldn't worry about it too much though, these calculations I gather are only intended to give an estimate.

[Lillywhite]

2.8%ABV from this site:-

http://www.rooftopbrew.net/abv.php

Not surprised very low OG and not so low Final SG.

[shandypants5]

So, if I use cornies and force carbonate, so dont add priming sugar....
The calculator I have been using is over reading by 0.5 ?
http://www.liquorcraft.com.au/wa.asp?id ... etails=106

Booo! now I will HAVE to drink more of it...