# Tagged Questions

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

114 views

### First brew: dry hopped mead, probably stuck. How to best proceed?

I'm on day 9 of my first attempt at home brewing (1 gallon batch), and based on my measurements on day 5 and today it appears to be stuck at 1.010 Original Gravity was 1.065 Kind of just went gung-...
47 views

### Question regarding which volume to use for OG calculation

My question is regarding which volume to use when calculating OG, and more importantly why. How to calculate the gravity points for a recipe is fine, but then according to BeerSmith at least, you ...
32 views

### Calculate preboil volume

I forgot to measure how much wort I had preboil. I did take a gravity reading preboil. Can I deduce preboil volume with post boil volume and pre & post boil gravity?
2k views

### Why less priming sugar in a mini keg?

I am used to bottling my beer and do bottle conditioning. However, I just bought a few 5l mini kegs for the next batch which is currently fermenting. From what I have read from different sources, you ...
266 views

### Plato degree to specific gravity conversion question

I have a question regarding the conversion from Plato degrees to specific gravity, and the widely used value of 46ppg for sugar dissolved in water. According to wikipedia, plato degrees are defined ...
269 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% ...
784 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 ...
405 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 ...
60 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 ...
383 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% ...
109 views

### Brewing Formulas?

What formulas and calculations exist for the home brewer?
201 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 ...
900 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 ...
537 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 ...
254 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 ...
6k 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 ...
951 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 ...
218 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 ...
912 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?
648 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 ...
941 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 ...
1k 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 ...
554 views

### Calculating boil volume in partial boil?

I'm an all-grain brewer but I haven't done an extract batch in years (or an all-grain one in over a year) and want to do an extract IPA this week. Looking at the various software and calculators, they ...
5k 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 ...
14k 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?
481 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 ...
464 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 ...
3k 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 ...
3k 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 ...
394 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?
4k 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/ ...
137 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 ...