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Old 09-06-2010, 09:18 PM   #1
chuckjaxfl
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Default PPG potential conversion to metric

Has anyone already figured out the formula to convert points/pound/gallons to points/kilograms/liters?

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Old 09-06-2010, 10:30 PM   #2
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Code:
bianco:~ john$ units
500 units, 54 prefixes
You have: pounds/gallon
You want: kilograms/liter
	* 0.11982643
	/ 8.3454045
HTH.
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Old 09-06-2010, 11:25 PM   #3
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I'm not following.

If I've got DME that will contribute 44 PPG, are you suggesting that I can take that and multiply it by 0.11982643/8.3454045 to get a metric contribution?

That would give me 0.631768409 points (1.0006) wort if I use a kilogram of the DME in a liter of water?

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Old 09-07-2010, 02:00 AM   #4
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points/pound/gal = points/(kg*2.2)/(liters/3.78)

Thus points/kg/l = 3.78*2.2 points/pound/gal.

Thus 44 ppppg = 365.9 ppkgpL and 1 kg of this DME in 1L would give 365.9 points or SG 1.3659 (except that at this strength the deviation from linearity would probably be noticeable. OTOH if you put .454 kg in 3.78L you would have 365.9*.454/3.78 = 44 points.

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Old 09-07-2010, 02:13 AM   #5
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So, roughly...

1ppg = 8.316 pKgL?

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Old 09-07-2010, 03:20 AM   #6
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Quote:
Originally Posted by chuckjaxfl View Post
Has anyone already figured out the formula to convert points/pound/gallons to points/kilograms/liters?
They're working on it at CERN during lunch breaks.

http://www.onlineconversion.com/
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Old 09-07-2010, 04:00 AM   #7
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Here is why I was wanting to know.

I've read some pages of people making slants/plates by simply measuring out the DME & Agar dry into each slant/plate, then adding hot water with a dosing syringe.

This seems less wasteful than my current method of making up 100ml of wort/agar, pouring too many plates, and then having them dry up before I can use them.

I wanted the conversion so I could make this spreadsheet. I can enter the numbers in column B, it will tell me what I need in column F.

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Old 09-07-2010, 11:40 AM   #8
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Quote:
Originally Posted by chuckjaxfl View Post
So, roughly...

1ppg = 8.316 pKgL?
Yes.
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Old 11-26-2010, 11:31 PM   #9
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I use this a bit (living in metric land).

I find it easier converting it to points per 100g per litre which is 1ppg = .8316 p/100g/L.

I like to work out my effeciency this way as the recipes I use are metric.

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