Questions tagged [specific-gravity]
Specific gravity in brewing is the ratio of the density of the wort to that of water.
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Checking gravity at mash out.
I'm still very new to all-grain, 7 batches in, so I am still a little shaky with procedure. The other day before my last batch I was re-reading "how to brew and noticed that John Palmer recommends ...
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Safe to return sampled wort to the primary after sampling?
I made my second batch of beer (ever) last Friday night, and in a few days' time I'd like to sample a bit of it so that I can check its gravity.
Provided that I sanitize all of my equipment (siphon, ...
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Determine honey density and needed volume for target starting gravity
Suppose I have honey of unknown specific gravity.
I want to mix a mead must with a target specific gravity g_t and volume V_t.
How do I determine how much honey to use?
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Stalled fermentation
I've started brewing an Oktoberfest. It has been in primary for a little less than a week. The first 24 hours was good, super active. After about a day, it got pretty warm here, and the ...
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Large drop in specific gravity over 24 hour period
My cider brew (5 gal) has experienced a large drop in its specific gravity readings over a 24 hour period. Yesterday it was measured at 1.05 with the kit recommending bottling at 1.04 or lower. Today ...
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Specific Gravity Reading
So with your help I've made into secondary fermentation of my first hard cider batch. I just have a question about specific gravity.
I started with a reading of 1.060.I measured it again from a ...
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How much free (ie, fermentable) suger is contained in canned fruit puree and how does this affect gravity?
Going to add one can (49oz) of Vintners Harvest Peach Puree to secondary and curious if/how much this will raise gravity. The nutritional label states the can contains 190 grams of sugar, but not ...
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FG of bottled condition beer lower than FG of fermented beer
I brewed a session stout about 4 months ago, and left it in the fermentor for two weeks. The FG was 1.012 one week in, and I checked every few days until 2 weeks in, and the FG remained at 1.012. I ...
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Specific gravity after adding cold-pressed coffee?
Like an amateur, I forgot to measure my cold-pressed coffee's gravity before combining in secondary. Anybody have an estimate of the gravity of a 24-hour cold-pressed steep?
I started with 36 ounces ...
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Specific Gravity: Refractometer and Hydrometer Disagree
I have tried to use a refractometer when brewing. I can never get an accurate pre-boil specific gravity reading that consistently aligns with my post boil, cooled wort hydrometer reading. I spoke ...
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Testing specific gravity before bottling
I brewed a batch of beer about 3 weeks ago, and I was told to test the gravity prior to bottling to make sure it is ready.
My question is, will I do any harm by opening the fermentation bucket in ...
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How to get a feel for the numbers involved in brewing
So I drink a lot of beer (go figure) and I try to characterize it each time. How much carbonation there is, what color it is, mouth feel, what specific flavors are involved, how hoppy it is, how malty ...
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Hydrometer broke, no original gravity
on brew day of my first batch, when i was ready to take OG reading, i dropped my hydrometer so no OG.
Is there a way to get a rough estimate of the OG. Thanks
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Muntons pilsner specific gravity not coming down
I'm relatively new to homebrewing and I tried a Muntons Extract Pilsner kit. I followed the instructions on the kit to a T and after 3 weeks (and having read other questions and comments on this site)...
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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 ...
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When/How to Measure Pre-Boil Gravity to Determine Mash Efficiency
I routinely take my pre-boil gravity after sparging to determine mash efficiency so that I can throw in DME or Dextrose for a lower than expected yield or add water for a higher than expected yield, ...
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DIY BrewBug based offerings?
BrewBug, is a neat little toy that essentially has a "floating bob" that measures the temperature and specific gravity of the wort as it is fermenting, allowing for niceties like changing the ...
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Is my SG too low? [closed]
I have an SG of 1,040, and the target OG is about 1.065.
I was wondering if this is too low?
Should I add more water?
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first stage beer seems slow (stopped?)
My first brew! I forgot to add yeast and put it in a day later. #embarrassing
I took a SG reading after 5 days: 1.018
I took another reading today, 7 days in, and it's only dropped to 1.016.
The ...
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First brew... 1.010 gravity in 72 hours?
I'm in the middle of my first brew and I'm having some issues. Not sure if I have completely ruined this thing or what. Heres the deal...
During the process, everything went pretty much as planned ...
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Does any "probe" exist which can detect the gravity of wort?
I use a Raspberry Pi in combination with a temperature probe to measure the temperature of my wort. It would be nice if I had another probe that could measure the current gravity of my beer, so that ...
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What can I learn from fruit beer gravity?
I just bottled a batch of a watermelon beer where the gravities going into and out of primary matched the predictions (OG 1.050, FG 1.012).
I added watermelon chunks in secondary and when it finished ...
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FG dropped after wort cooled
Did a brew yesterday, hit the desired SG after the boil time - or so I thought. After cooling the wort, the SG dropped 2 points. What would cause this?
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Why doesn't FG reach 1.000?
My second beer brew has pretty much finished its primary fermentation. It started at 1.044 and is currently at 1.014... I don't expect it will go much further.
Having brewed numerous wines I ...
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Seeking formula for adding sugar dissolved in water to produce specific gravity
I have seen several tables, notably:
http://winemaking.jackkeller.net/hydrom.asp
http://www.beer-wine.com/learning/how-adjust-specific-gravity
http://www.brsquared.org/wine/CalcInfo/HydSugAl.htm
But ...
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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 ...
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Why does gravity increase between pre-boil and pitching?
My handy-dandy "Beer Craft" book has a handful of recipes with useful information, including expected targeted pre-boil gravity, original gravity, and final gravity. Their pale ale recipe, for ...
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should I/how do I account for temperature differences for gravity readings?
I've taken my OG at the start, and another reading last night. Only last night did I register that my OG seemed slightly low according to what the brew can suggested as typical.
My OG was 1.037 (can ...
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Why shouldn't we just use scales?
New on homebrew.SE, great forum here. Just a quick question - why shouldn't we just use weight scales to determine the OG and FG? My Hydrometer has broken and I can't be stuffed really buying a new ...
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Hydrometer correction equation
Can you identify the constants in your hydrometer correction equation? I know that 2.6X10-6 is the coefficient of thermal expansion for the hydrometer glass; what are the others (not related to ...
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Ensuring an accurate gravity reading
So I've brewed between 6-10 batches of beer at home using partial boil methods but have never managed to get accurate gravity readings.
The issue I have is that my readings somehow always seem to be ...
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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?
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Measuring specific gravity without sampling
Is there any way, I can measure SG with a sensor of some kind?
I guess I'm not REALLY after SG, but rather a way to determine that fermantation is done, without sampling.
I would very much like hook ...
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Should I be disappointed?
Just started, so my question is very basic.
I got Coopers Lager Kit, did everything by instructions, temperature has been stable at 22-24C but gravity doesn't go down. OG was 1.039, dropped to 1.020 ...
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How can this BeerSmith 2 gravity calculation be correct?
My beersmith brew sheet printout gives me some gravity numbers that I can't make head or tail of:
How can the pre-boil gravity (when I haven't added 57% of the malt yet) be 1,084, while the post-boil ...
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Do I need to adjust for temperature with a refractometer?
Sorry for the simplicity of the question, but I asked Google and she didn't know. Stackexchange is my next stop.
I took a brix reading of my steam beer wort at 13 brix (~1.052 SG), but it was ...
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Potential causes of unreliable pre-boil gravity measurement
I usually take a hydrometer reading immediately after sparge so that I can calculate total points of gravity (i.e. gravity reading * volume), and from there calculate what volume of wort I should ...
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How do you calculate how much extract to add if you don't hit your target gravity pre-boil?
Planning to do my first all-grain BIAB. If miss my target gravity after mashing, how do I figure out how much extract to add before I start the boil in order to reach that OG?
I would imagine pre-...
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How to lower Final Gravity?
I made a Thomas Coopers Stout with 1.1kg of dark malt extract and 400g of maltodextrin and used the yeast that came with it. I got a Starting Gravity of 1.046 and Final Gravity of 1.024.
Are there ...
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Does suspended yeast contribute to high SG?
I've got a SMaSH beer (Baird Maris Otter and EKG) finishing in primary. It's been fermenting for just over a week. Starting Gravity was 1.046. I mashed at 154F for 60 minutes. Fermented with WY1335 ...
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Does white honey have greater effect on gravity?
A few weeks ago I made my first mead (actually a braggot). I ordered a 12 lb bucket of raw honey. To my surprise, when I opened it the honey inside was a creamy, almost foamy opaque white. It didn't ...
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Does a malt "late addition" affect OG?
I'm following a recipe from a book for an IPA that calls for the following (simplified) steps:
Boil water (3G/11L)
Add Light DME (1lb/450g) & return to boil
Add hops
At 45 mins, add LME (6.6lb/...
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My cider stopped fermenting until I swished it around in the bucket a bunch, then continued. Is that normal?
My malted cider had been brewing after about a week in my plastic brewing bucket to the point where the little 'hat' thing in my airlock fell onto the 'neck' (no internal pressure).
I opened it up ...
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adding 1 g to 5 g recipe - keep OG the same
So i've got a 5 gallon partial mash kit(OG 1.065), and I am looking to add around a gallon to increase my yield for the session.
What formula could I use to know how much extra dme to use to keep ...
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Why an all grain stops at 1.030 when there are an abundance of champagne yeast
I did an all-grain rye for a mash and pitched with Premier Cuvee yeast (tolerant to 18% abv), 5 grams to 4 gal wort. Repitched it again and the forced fermentation test indicates that the mash is done ...
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checking gravity during and after fermentation?
How could I pull out a little from my carboy to take gravity readings during fermentation?
I tried to use a auto-siphon but it was a mess.
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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 ...
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What exactly should I measure while brewing?
I want the answers to be geared towards meads/wines if possible.
There seems to be so many things to measure. Which are the ones that really matter? I've started spending a lot of time taking all ...
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IPA: When to Bottle
My IPA was in the primary for 10 days and gravity readings where steady before racking to the secondary. It’s been in the secondary for 13 days now and emits one bubble every 75 seconds on average. ...
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Water PH level and the effect on original gravity
What effect, if any, does the pH level of my water have on OG?
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