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Old 01-11-2012, 11:32 PM   #1
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Default 4 quarts does not equal 1 gallon milk jug?

I'm just starting doing all grain batches and using BeerSmith, so I'm trying to get a little more serious about my volumes.

I thought it would be a good idea to mark the side of a gallon jug by the quart, but I came up really short. I measured 2 cups (1/2 qt) at a time, and let everything settle before marking and measuring.

Are the 1 gallon jugs really that much more than 1 gallon? Or am I measurically challenged

What are you guys using to measure out quarts/gallons with decent accuracy?



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Old 01-11-2012, 11:37 PM   #2
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I used a 2 qt picture to measure out gallon marks on my keggle and a glass measuring cup to find out where the actual 2 qt mark came up to on that picture. (do you think you could shrink your image a bit. It's gynormous
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Old 01-11-2012, 11:46 PM   #3
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Yes, that looks about right for a milk jug. I measured mine by weight since I figured my scale was more accurate than my measuring cups. Came out close enough as made no difference.

Plastic jugs sag also, which makes them appear to hold more than if you square up the sides. You'll see the level change the first time you open just about any beverage in a plastic container, so the discrepancy isn't as large as it appears.
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Old 01-11-2012, 11:53 PM   #4
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Quote:
Originally Posted by Dan View Post
I used a 2 qt picture to measure out gallon marks on my keggle and a glass measuring cup to find out where the actual 2 qt mark came up to on that picture. (do you think you could shrink your image a bit. It's gynormous
OK, you were right. It was so big I couldn't find the edit button for a sec.
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Old 01-13-2012, 01:03 AM   #5
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That looks about right from my experience. Glass one-gallon jugs, too.
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Old 01-13-2012, 01:18 AM   #6
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I came up with the same thing on my plastic jugs with a measuring cup. To think I used to just fill them up to the top thinking it was a gallon. I never could figure out why I always had more water than I was supposed to have.. When I started AG I figured it all out..
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Old 01-13-2012, 01:25 AM   #7
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I use a 4 quart aluminum pitcher I got from Northern Brewer. It's cheap, marked off at each quart and works well with hot liquids. I highly recommend it.
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Old 01-13-2012, 01:38 AM   #8
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Quote:
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I use a 4 quart aluminum pitcher I got from Northern Brewer. It's cheap, marked off at each quart and works well with hot liquids. I highly recommend it.
I made a DIY mash paddle with with notches for my kettle.. I put notches for 1/4, 1/2, 3/4, and full gallon graduations up to 9 gallons. that works great for me now..
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Old 01-13-2012, 10:54 AM   #9
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Producers of liquids must have at least the advertised amount in the jug and when filling they need a little extra space to make sure that the advertised amount will fit so the jugs must be larger than the anticipated fill amount. Your gallon jug looks fine.
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Old 01-13-2012, 03:07 PM   #10
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your are always better going by weight to determine your volumes

1 gallon of water = 8.345 264 109 3 Pounds

metric is even easier

1 liter = 1 kilogram @4C

round off as is most convenient and you'll still be more accurate than using measuring cups


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