How do I calculate potential ABV from % of malt used?

Can't find this info anywhere on the internet.

Any brewing software would give you that info. Some choices are Beersmith, Promash and Beer Tools. If you have an iPhone there are a few apps you can use on there as well, I use Brew Pal.

davidanddeirdre said:

Can't find this info anywhere on the internet.

Click to expand...

I just strated using Beersmith. It works great.


Roger

Here is a screen shot from Brew Pal.

Brew Pal is no longer available what a bummer it looks like a good app.

I just downloaded brew pal 3 weeks ago on my iPod. Are you certain it isn't available?

http://www.brewpal.info/

Website says for some unknown reason it's not showing up in the app store. I'd check back in a week or so.

Do you know how to calc. what your OG is going to be?
(if don't know that it's also easy to figure out)
Figuring out the ABV is pretty easy.
If you have an OG of 1.050, and your yeast attenuation rate is 65% to 75%
.65x50=32.5
.75x50=37.5
50-32.5=17.5
50-37.5=12.5
so you can expect an FG somewhere between 1.017 and 1.012
depending on grain bill,mash temp,ferm temp.,pitchiing rate, etc.
then (OG-FG)x133=ABV
so your ABV will be somewhere between
(1.050-1.017)x133=4.4%ABV
(1.050-1.012)x133=5%ABV

You need this:
https://www.homebrewtalk.com/wiki/index.php/Malts_Chart
and you need to read these:
"How to Brew" John Palmer chapter 18
"Designing Great Beers" Ray Daniels chapters 5&6

There is really too much info to explain it here and I don't want to confuse you. These books should be part of your brewing library anyway.

I second "Designing Great Beers". It goes into excellent detail on how to calculate your grain needed to hit specific targets and so on. There's math involved but it's all relatively simple once you read through it and remember the calculations. Nothing more than elementary school level math.

Here's something that helps you calculate ABV % by using the amout of extract in your recipe.

http://www.brewersfriend.com/extract-ogfg/

Thanks chaps. http://www.brewersfriend.com/extract-ogfg/ provided the answer.