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-   -   Just found out we don't own a scale (http://www.homebrewtalk.com/f39/just-found-out-we-dont-own-scale-366968/)

timcadieux 11-11-2012 03:45 PM

Doing a recipe that asks for 300g of dextrose, it only comes in bags if 1kg. Just found out we don't own a scale for the kitchen. Can someone tell me, is 300g just a smidge over 1cup, maybe 1cup and 1/4?

Thx

LegitBrew 11-11-2012 04:53 PM

i wouldn't worry too much about being exact if you do not have a scale. its not going to make or break the beer. cup and half sounds roughly close. found this:
http://www.homebrewtalk.com/f39/question-measuring-dextrose-grams-cups-ml-196832/

zeg 11-11-2012 07:06 PM

The exact volume depends on, among a few things, how coarse the grains in your dextrose are, so it's hard to give an exact weight/volume conversion factor.

However, you are fortunate in that you know that you have 1 kg of dextrose in your bag. You can measure your own conversion factor that will be more accurate than a stock value pretty easily. What I would do is get two big bowls (or pots or whatever; make sure they're very dry). Dump the bag into one of them and use a whisk to stir it up. The idea here is to make sure it's not clumped together at all. Now get a measuring cup and measure from one bowl into the other to find out how many cups of sugar you have. For best results here, I would use a spoon to scoop the sugar and pour it loosely into the measuring cup. The idea is you want to avoid compacting it down because that'll be hard to replicate.

So now you know you've got 1 kg and it fills X cups (or mL or hogsheads or whatever your favorite volume measure is). Divide 1 kg by the volume and you'll have the density, which you can use to compute how many cups you need for 300 g.

That's overkill for a recipe, though. Just pour a bit less than half. If you're bottling, it is probably worth being more careful.

Nova5 11-11-2012 09:08 PM

Just run out to a decent grocery store, target, walmart, etc.. get a kitchen scale. If you can post and wait for an answer.. you can make the run ;)

Or send SWMBO.

timcadieux 11-11-2012 11:31 PM

Hah, thx for the responses. While I was waiting, I sent the wife to Walmart for a scale. Gonna use it shortly, just 12hrs behind schedule.

Unibrow 11-11-2012 11:45 PM

Quote:

Originally Posted by timcadieux (Post 4580074)
Hah, thx for the responses. While I was waiting, I sent the wife to Walmart for a scale. Gonna use it shortly, just 12hrs behind schedule.

Wish I could send my wife on beer equipment missions.

philjohnwilliams 11-12-2012 04:02 AM

Probably too late for you this time, but in an emergency you can dissolve the full 1kg in a litre of water. 300ml of this solution would be almost exactly 300g.

surume 11-12-2012 05:00 AM

Fill a bowl with water to the top, then place your bag of dextrose inside.
Collect the overflow in a larger bowl or tray, and measure how much overflowed.

The volume of the bag shouldn't make too much of a difference.
Therefore, you can divide the volume of the overflow by 1000 grams.
Now, multiply that volume by 300.

There, you have the amount of dextrose you need in volume.


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