Any sort of numerical manipulations used in calculating brew-related quantities such as bitterness, original gravity etc.

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3answers
89 views

Mash & Sparge Calculation

I'm planning on brewing a double batch of "OktoberFAST" this weekend. I've used a few online brewing calculators and they seem to be giving me the wrong answer. I've always read that if more then 50% ...
5
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1answer
212 views

How is ABV calculated if distilled spirits are added to beer?

How would one calculate the ABV of a beer if distilled spirits were added? For instance, when making a beer recipe that called for adding bourbon as a flavoring agent. If you started with, say, 5 US ...
0
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1answer
122 views

Calculating Potential ABV

I've seen some tables online like the ones at American Homebrewers Association and Brewhaus Canada that list Potential ABV for different values of Original Gravity. My intuition tells me that these ...
4
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1answer
47 views

Determining the amount of herbs to use

I am planning on brewing a herb beer; Rooibos Honey Ale. Question one is: How can I estimate (ball park) the amount of herbs to use prior to brewing the beer? Should I make a tea and then calculate ...
1
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1answer
103 views

Thermal expansion of wort

Does anybody know an algorithm or a calculator to compute thermal expansion of worts? Most of the time in homebrewing materials, it is said that in volume calculations one should account for 4% ...
1
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1answer
91 views

Brewing Formulas?

What formulas and calculations exist for the home brewer?
5
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5answers
318 views

Beer recipe calculations?

Does anyone know of a good place to get all the various formulas used to compute final gravity, color, bitterness, etc. in your beer?
2
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1answer
101 views

Inconsistencies in fermentables' ppg calculation

I've been searching around the net, asking in forums, even writing to Weyermann, trying to figure out what is the correct formula -- using a malt spec sheet -- to calculate the ppg value that I can ...
0
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0answers
17 views

What is the EZ Water Calculator for? [duplicate]

has anyone used the EZ Water calculator? I'm new at this and have been reading a lot but don't quite understand the purpose of such spreadsheet... Could you provide a little more info? Thanks!
2
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3answers
358 views

How does a yeast starter affect original gravity reading?

I've prepared a 1qt (~1L) yeast starter according to instructions from Wyeast.com. I didn't measure its gravity, but in theory it should be about 1.040. I am brewing a 5 gallon batch of high gravity ...
2
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3answers
2k views

Calculating carbon dioxide production during fermentation

I know yeast ferments sugars into alcohol at a predictable rate, but is the same is true for carbon dioxide? Since I know the amount of sugars fermented though my gravity readings, shouldn't it be ...
2
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3answers
292 views

Is there open source web library for Calculating ABV or other brew related tasks

Is anyone aware of a good script or library free/Open Source that can be used on a web page to calculate ABV, I'm not looking for a sites that will do the calculation for you, I want to add the ...
6
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1answer
197 views

Why is it necessary to approximate starting and finishing gravity?

In the book "Home Beermaking", by William Moore, it talks about calculating starting and finishing gravity in chapter 6. I believe that he's talking about when I get good enough at homebrewing to make ...
4
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2answers
410 views

Determining beer quantity when FG and weight are known

In making the assumption that given the final gravity and physical weight of beer (or any liquid for that matter), that you can find the total quantity, what is the calculation necessary for ...
3
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2answers
186 views

What factors go into calculating perceived sweetness/bitterness?

Some sites calculate bitterness vs sweetness on a scale of sorts, where one side is "malty sweet", and the other side is "hoppy bitter" (ex. hopville). My question is, to do a very basic calculation ...
0
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2answers
662 views

Can I derive Final Gravity from Original Gravity and ABV?

I think the answer is yes. Since we use OG and FG to determine ABV ... I would assume we could do the same with ABV and OG to determine FG, right?
3
votes
1answer
382 views

How does efficiency change when adding grains that are normally steeped to a mash?

Imagine this scenario: you have a an extract recipe that contains a pound of steeped caramel malt. According to http://www.promash.com/FAQ/faq_diff.html the average efficiency of steeped malts is ...
6
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2answers
599 views

Measuring yeast in a slurry

Please tell me if I'm being overly simplistic here. I was reading the book yeast by Chris White and Jamil Zainasheff. In the book, they talk about measuring how many cells are in a slurry by using a ...
3
votes
1answer
721 views

Why does the temperature of bottle conditioning determine the amount of priming sugar?

When using CO2 calculators or the nomograph on Palmer's site we see that depending on the temperature of your beer, you use a different amount of priming sugar in order to get the same effective ...
4
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3answers
129 views

Is there a brewing software that supports late additions?

Promash doesn't support late addition of extracts (which affects hop extraction). Either that, or I can't find out how to do it. I sometimes use beercalculus.hopville.com to create two recipes, one ...
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2answers
3k views

Can we estimate the temperature rise in the primary due to fermentation?

OK, this is sort of cheating but I really liked this question so I thought I'd ask the question again in a slightly different way and try and answer it. I was wondering if we can actually estimate ...
1
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1answer
375 views

Calculating boil volume in partial boil?

I'm an AG brewer but I haven't done an extract batch in years (or an AG one in over a year) and want to do an extract IPA this week. Looking at the various software and calculators, they don't seem to ...
6
votes
3answers
2k views

Yeast Starter Steps

I want to make a yeast starter for a lager. I even went out and got a 3000 ml Erlenmyer Flask. According to mrmalty.com's calculator I need 506 Billion cells. With the two vials of White Labs yeast ...
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3answers
9k views

Temperature correction for specific gravity

If I want to convert my specific gravity reading from one temperature to an equivalent specific gravity at 60F how do I do it? Can you give me a correction factor for this case?
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11answers
2k views

What are my options for brewing software?

I'm looking for brewing software that helps with record-keeping, calculations, inventory, and/or recipes. Across any platform (Windows/Mac OS X/Linux), what brewing software is available, and what ...
3
votes
1answer
429 views

Quantifying the level of hoppiness in a beer

Does anyone know of some sort of measurement for the hoppiness of a beer? Late hop additions don't add much to the bitterness (IBUs) but they can add tons of hop flavor. Is there some way to ...
2
votes
3answers
379 views

Homebrew Calendar/Planning Software/Site?

Does anyone know of a solid application for pre-planning your homebrews? I have a really tight schedule, and determining when to start a batch can be a real hairball. There are lots of variables and ...
6
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1answer
3k views

What's the ideal size for a mash tun?

This question has been bothering me for a while and I looked it up using google. The only related search result was this thread http://www.homebrewtalk.com/f11/how-big-your-mash-tun-needs-123585/ ...
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1answer
10k views

[WIKI] How Do You Calculate Original Gravity?

This is a community wiki post. Anybody with more than 100 reputation can edit it. You may also post your own answer. I get no reputation if you vote the question up or down, however, please vote up if ...
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3answers
519 views

Are there any reverse recipe caluclator / generators online?

I have a bunch of small amounts of leftover specialty grains ranging from 3 ounces to about 8 ounces of various types. I'd like to brew something with them. Are there any good sites out there that ...