Calculators

Just starting out and need some advise? then post it in here.

Calculators

Postby BackyardBrewer » Tue Jul 30, 2013 7:24 pm

I use wolfram alpha's website and this equation:
http://wolframalpha.com/

1*((95/40)-1)=

Just adjust the first 1 for the amount of pure spirit and the 95 for the reported abv as your alcometer shows it.

Post if you need help. Next we'll talk about temp correcting for extra accuracy:-)
BackyardBrewer
Site Donor
 
Posts: 1824
Joined: Thu Mar 22, 2012 1:18 pm
Location: South Aussie
equipment: Solid Copper Love Machine (Plated column bubbler), hand made with love by a forum member
50L keg boiler with 2 x 2400w elements
PURE distilling Reflux still + a tonne of homebrew gear amassed over 10 years of brewing.

Re: Calculators

Postby PeteBignell » Wed Jul 31, 2013 12:09 am

BackyardBrewer wrote:I use wolfram alpha's website and this equation:
http://wolframalpha.com/

1*((95/40)-1)=

Just adjust the first 1 for the amount of pure spirit and the 95 for the reported abv as your alcometer shows it.

Post if you need help. Next we'll talk about temp correcting for extra accuracy:-)


I must point out that the formula above is incorrect. It has too many brackets. The calculation will work out if you have 1 litre or 1 gallon but won't work for any other volume.

Should read 1*(95/40)-1=

To explain the maths slightly differently,

ABV of your uncut spirit (say 95%) divided by ABV you require (say 40%) ie 95/40

Multiply this by the volume you currently have say (5 litres)

Now we have 5 * 95/40 = 11.875 litres which will be your final volume of 40%

All you do is add water until the final volume comes up to 11.875 litres (everything at 20 deg C)

Sorry to crap on a bit, but you might think the amount of water to add is
11.875 - 5 = 6.875 litres, that is probably good enough but the real answer is 7.21 litres to add because when adding pure alcohol to water the total volume shrinks. The maths for that is very complex.

Many home distillers work out how much to add, ie 5 * (95/40) - 5 = 6.875 which is probably good enough, but there is more maths and less accuracy.




ps if you leave the extra brackets the apparent answer is minus 13.125
PeteBignell
 
Posts: 36
Joined: Sat May 05, 2012 8:59 pm
Location: Tasmania
equipment: 600 litre copper pot, fired with biodiesel
Grow and malt my own rye

Re: Calculators

Postby Dino61 » Fri Jan 24, 2014 3:25 pm

Handy calculators , cheers :-)
Dino61
 
Posts: 39
Joined: Sun Jun 24, 2012 3:18 pm
equipment: custom 80l stainless boiler made n NZ , 2x 2400w elements, reflux and pot heads.

Re: Calculators

Postby Snoozin » Wed Jun 25, 2014 6:25 pm

Hi guys,
I would like to ask a really noob question here please?

I used the wash calculator to determine the approx % of alcohol from the wash and came up with 14.70%.
Start wash was 1.094 and end was .980 which gave me 14.70, when I place some of the wash in my test tube and used the alcoholometer to see if it would give the same reading I was dumbfounded that it showed a reading of about 6-7%, is there a reason for this or can't you use the alcoholometer to measure an un distilled wash.

BTW it was a turbo wash mix ( my last one as I am using the TPW, just didn't want to waste the turbo since I paid for it).
And yes I use an air still for all the purists out there, due to room constraints, but I use the chart that has been circulating done by MOZR (I believe).
Snoozin
 
Posts: 10
Joined: Fri May 02, 2014 8:47 pm
equipment: Air still & T500
25lt fermenter
Old fridge used as a fermenter store (better temp control)
Untold glass jars/containers

Re: Calculators

Postby Kimbo » Wed Jun 25, 2014 9:01 pm

Snoozin wrote:Hi guys,
I would like to ask a really noob question here please?

I used the wash calculator to determine the approx % of alcohol from the wash and came up with 14.70%.
Start wash was 1.094 and end was .980 which gave me 14.70, when I place some of the wash in my test tube and used the alcoholometer to see if it would give the same reading I was dumbfounded that it showed a reading of about 6-7%, is there a reason for this or can't you use the alcoholometer to measure an un distilled wash.

BTW it was a turbo wash mix ( my last one as I am using the TPW, just didn't want to waste the turbo since I paid for it).
And yes I use an air still for all the purists out there, due to room constraints, but I use the chart that has been circulating done by MOZR (I believe).

you hit it right there mate.... Alcometers arent real accurate in a wash. Trust your Hydrometer :handgestures-thumbupleft:
Kimbo
Site Donor
 
Posts: 5461
Images: 0
Joined: Fri Mar 18, 2011 6:33 pm
Location: Perf WA
equipment: 4" bubbler with a 6"inline thumper

Re: Calculators

Postby Snoozin » Thu Jun 26, 2014 7:19 pm

Thanks Kimbo, I thought I might of been doing something wrong. But it's all good yay. :text-thankyoublue:
Snoozin
 
Posts: 10
Joined: Fri May 02, 2014 8:47 pm
equipment: Air still & T500
25lt fermenter
Old fridge used as a fermenter store (better temp control)
Untold glass jars/containers

Re: Calculators

Postby EziTasting » Thu Oct 08, 2015 8:36 am

I don't seem to be very good at finding the answers to some of my questions ... perhaps they are irrelevant, BUT (I have a big butt :laughing-rolling: ):-

Is there a calculator that tells you, once you do it correctly, how much alcohol you would produce per gram or Kilo of grain? Would that depend on the method used to ferment it?

I don't want to go out and spend all my money on grain only find out that it produces more alcohol than I can handle ... if you get my drift. I'd like to get a better feeling on how much grain would be required to make XYZ litres of alcohol so that I don't spend needed $$ in grain that I could use to get more Yeast/ bottles/ other required equipment and materials...

Keep in mind, I'm starting out and am at the biggest cost stage of this whole process - set-up.
EziTasting
 
Posts: 2042
Joined: Fri Sep 25, 2015 5:15 pm
Location: FNWA
equipment: Newbie - Keg Boiler & 4" 4 plate glasser

Re: Calculators

Postby WTDist » Thu Oct 08, 2015 9:29 am

different grains have different starch/sugar content
WTDist
 
Posts: 2
Joined: Sun Oct 05, 2014 11:32 am
Location: Brisbane
equipment: Building a 4" bubbler with 8" glass thumper

Re: Calculators

Postby EziTasting » Thu Oct 08, 2015 10:04 am

WTDist wrote:different grains have different starch/sugar content



OK, is there a rough table or calculator? Was hoping for a little more...
EziTasting
 
Posts: 2042
Joined: Fri Sep 25, 2015 5:15 pm
Location: FNWA
equipment: Newbie - Keg Boiler & 4" 4 plate glasser

Re: Calculators

Postby jacobraven » Thu Oct 08, 2015 10:41 am

jacobraven
 
Posts: 289
Joined: Wed May 20, 2015 6:05 pm
Location: NENSW
equipment: 100 Litre Milk Can
Neutralizer
2 2400w

Re: Calculators

Postby TheMechwarrior » Thu Oct 08, 2015 10:47 am

What you're after is really a mash bill calculator, there's plenty available but many who are keen simply create their own.
The grain suppliers can provide you with the spec sheet for your grain alternatively download one of the many home brewing/beer apps such as brew mate.
TheMechwarrior
 
Posts: 1006
Joined: Mon Dec 05, 2011 1:43 pm
Location: Tasmania
equipment: Five Star Distilling 6" neutraliser with
100L boiler

Re: Calculators

Postby EziTasting » Thu Oct 08, 2015 11:14 am

Thank you Jacob, excellent thread and I have read it, front to back. It didn't, from memory, answer my question - I will revisit tonight.

TheMechwarrior wrote:What you're after is really a mash bill calculator, there's plenty available but many who are keen simply create their own.
The grain suppliers can provide you with the spec sheet for your grain alternatively download one of the many home brewing/beer apps such as brew mate.


OK, did not know that. Does this 'spec sheet' have a specific name or do I refer to it as just that, a spec sheet?!?
EziTasting
 
Posts: 2042
Joined: Fri Sep 25, 2015 5:15 pm
Location: FNWA
equipment: Newbie - Keg Boiler & 4" 4 plate glasser

Re: Calculators

Postby woodduck » Fri Oct 09, 2015 5:18 pm

I may be way off here but wouldn't you be better off looking in the recipe section. They will give you a list of ingredients and the size of wash then work on 8-10% alc depending on how much sugar you use. If you are doing all grain then look at brendans recipes I'm pretty sure it tells you in there. Might be easier than reverse engineering a recipe?
woodduck
Moderator
 
Posts: 3459
Joined: Mon Jun 16, 2014 5:54 pm
Location: Good old country SA
equipment: 4 plate 6" copper bubbler, 6 plate 4" glass bubbler with 500mm packed section three way thumper sitting on a 50 ltr keg boiler with 6000watts, 2" pot still and a 2" boka.

Re: Calculators

Postby res » Fri Oct 09, 2015 9:40 pm

EziTasting wrote:
WTDist wrote:different grains have different starch/sugar content



OK, is there a rough table or calculator? Was hoping for a little more...



Grains differ in there potential but the biggest difference will be in your mashing procedure efficiency.

Most home brewers are happy with 80% efficiency, that is getting 80% of the total sugars.
Very hard to know exactly how much grain you'll need before you know how well you system will work. :think:
res
 
Posts: 439
Joined: Thu Aug 22, 2013 10:12 pm
Location: Melbourne
equipment: Custom 4", 5 plate FSD bubbler, 600mm packed section.
50lt keg boiler with 2x 2400w elements
5lt copper pot still

Re: Calculators

Postby Amberale » Tue Mar 19, 2019 9:05 am

Thanks guys.
Amberale
 
Posts: 118
Joined: Mon Mar 04, 2019 5:47 pm
Location: Bacchus Marsh(ish)
equipment: SS Turbo500, 5* Neutraliser.

Re: Calculators

Postby BigRig » Thu Nov 14, 2019 7:31 am

Is there a calculator to help with increasing ABV. Only see a dilution calc.

Please move if this is the wrong place - i am trying to work out how much 90%abv I need to add to 5L of 40%abv to get it up to 60%abv.
Last edited by BigRig on Thu Nov 14, 2019 7:33 am, edited 1 time in total.
BigRig
 
Posts: 32
Joined: Sun Apr 07, 2019 1:29 pm
Location: Brisbane, QLD
equipment: Digiboil 35L boiler with 2" copper boka style stil

Re: Calculators

Postby The Stig » Thu Nov 14, 2019 8:42 am

Use the dilute calc and drop the -
I have done this and it seems to be close enough :?
You do not have the required permissions to view the files attached to this post.
The Stig
Site Nerd
 
Posts: 9043
Images: 9
Joined: Sun Jun 19, 2011 8:37 am
equipment: Only the Best will Do.
Mac4 SSG Bubbles of Joy

Re: Calculators

Postby db1979 » Thu Nov 14, 2019 10:34 am

That approach is no good, it'll get you to 52.5 %. You'll need to add 3.333 L of 90% to get 5 L of 40 % up to 60 %.
db1979
Mentor
 
Posts: 1758
Joined: Sat Dec 29, 2012 3:47 pm
Location: South of the big smoke in banana bender land.
equipment: Eve - 4" x 4 plate solid state bubbler (sieve plates), 330 mm packed section on a keg boiler with 2 x 2000 W elements.
Currently having a makeover: 2" x 4 plate solid state bubbler (1" bubble caps, no sight glasses...maybe not for much longer!) on a bain-marie boiler.

Re: Calculators

Postby db1979 » Thu Nov 14, 2019 10:37 am

Can we add a calculator for it?
db1979
Mentor
 
Posts: 1758
Joined: Sat Dec 29, 2012 3:47 pm
Location: South of the big smoke in banana bender land.
equipment: Eve - 4" x 4 plate solid state bubbler (sieve plates), 330 mm packed section on a keg boiler with 2 x 2000 W elements.
Currently having a makeover: 2" x 4 plate solid state bubbler (1" bubble caps, no sight glasses...maybe not for much longer!) on a bain-marie boiler.

Re: Calculators

Postby bluc » Thu Nov 14, 2019 12:32 pm

:text-+1: I use "to make" calculator more than dilution.
bluc
 
Posts: 7346
Joined: Tue Apr 14, 2015 5:47 pm
Location: sunshine coast
equipment: 2" pot with 2" shotty 400mm long 5x 1/2" on a t500 boiler.
50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

PreviousNext

Return to Beginners Questions



Who is online

Users browsing this forum: No registered users and 9 guests

x