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 Home Brew Forums > Batch size calculation
10-18-2008, 11:41 PM   #1
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 Batch size calculation

I made a mead today with 12.75 pounds of honey and topped it with water to make 5 gallons total.

On beersmith I'm trying to calculate the gravity/ABV so would batch size be 3.50 gallons or 5 gallons? I think the 12.75 pounds of honey was roughly 1.5 gallons so there would be 3.5 gallons of water. Thanks in advance!

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10-19-2008, 12:03 AM   #2
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Your batch size is 5 gallons, if you made a 5 gallon batch.

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10-19-2008, 04:08 AM   #3
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Enter 12.75 in the Honey Lbs cell, and then adjust the water volume column "V(C)" to 63 and you find that your batch size is 5.02 gal, the OG is 1.090, and the expected ABV at a FG of 1.000 is 11.9%.

If you employ a staggered nutrient protocol, the spreadsheet automatically calculates the corresponding nutrient add points.

And , if you use a refractometer, it provides the means to determine SG readings (adjusted for the presence of alchol) as the fermentation progresses...

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10-24-2008, 02:18 AM   #4
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This does bring up a point I've been muddling around---an issue with recipes:

I've pieced together the idea that the ratio of honey to water can vary between 1lbs per "gallon" to 5lbs per "gallon"

Of course, honey (having a mass of its own) takes up space too...

So I think its best to read this as 1 - 5 lbs of honey per gallon of must.

Therefore all those recipes you read that say "for a 5 gallon batch you need 5 gallons of water, 10 lbs of honey..." are just plain lying to us! Or maybe that extra water is for cleanup...

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10-24-2008, 03:32 AM   #5
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Quote:
 Originally Posted by Driftless ...Of course, honey (having a mass of its own) takes up space too...
The Mead calculator spreadsheet accounts for the honey volume in the final results.
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10-24-2008, 04:08 AM   #6
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True...

However, the point I think I am making (if there is a point here) is the inconsistency in reporting... Which probably is just "one of those things."

For example, in reporting a 3 Gallon recipe many say:

3 Gallons water
10 lbs honey

When, the recipe should be 2.15 gallons of water, 10 lbs honey...

Of course it would be most useful to say: 4.64 lbs of honey per gallon of water, or 3.333 lbs of honey per gallon of must for recipe scaling.

Unless someone has the spreadsheet in front of them, it could be confusing.

Minor point... just rambling. Of course, the only formula one really needs to know is: water + sugars + yeast + time = happiness

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10-24-2008, 04:22 AM   #7
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I have noticed this as well. It can be a bit confusing, even on the spreadsheet. Its all good though, most of us get there in the end.

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10-24-2008, 01:06 PM   #8
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Quote:
 Originally Posted by Driftless True... However, the point I think I am making (if there is a point here) is the inconsistency in reporting... Unless someone has the spreadsheet in front of them, it could be confusing.
Your point is most valid. One may find recipe inconsistencies, oversights, and errors in many places - even Ken Schramm's book has them. Newer brewers, who lack the experience to identify these issues, simply follow the recipe and find the results are not always successful.

I'm not suggesting that this happens intentionally, but it happens and it is why I always check as much information as possible about a new recipe before making it. One reason the mead spreadsheet was developed was to give others the means to do the same...
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10-24-2008, 05:11 PM   #9
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I don't even deal with units of honey. I just start with about 3.5 gallons of water and keep adding until I get my desired sg.

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10-24-2008, 05:26 PM   #10
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Ive seen a lot of recipes written as: 10 lbs honey, and water to reach 5 gallons.
Would that be a more accurate way to write it?
Generally, how much does honey weigh? Like a liter or a gallon of honey would generally weigh how much?

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