Aussiedistiller, Home Distilling, Moonshine, Home Brew

Wondering if anyone knows of a calculator that can tell me the weight of alcohol at any given strength %

First result on google.

http://www.endmemo.com/cconvert/kgl.php

Lots calculator but none vary weight by abv..

Why?

Curious and to find out how much rum i have in my barrel for christmas :laughing-rolling:

Its just a density problem, right. Should be able to work out the density for the current abv. Then work out either litres from weight

How do i work out the density :-B

Density is given for a certain abv. Google can give you a table of kg/L values for any given abv. Then its basic maths to turn a weight into a litre vale, or vise versa.

If you know the weight of the barrel empty, you could pour off a portion at a known volume and weigh it. Then you could convert that to mass / liter. There will aalways be error involved though because the barrel will have absorbed some liquid, but that should be fairly negligible.

cant you just take a sample, measure the ABV, say 40%, then u know how much you have. Is 'weight' overthinking it?
If its the weight inside the barrel, just empty the contents and record how many lit you have, put it back and record what goes in and comes out afterwards.

Or just use a dip stick :laughing-rolling: but the answer is there's never enough rum :laughing-rolling: :laughing-rolling:

Wj :laughing-rolling: :D Dang no wonder i failed school..

Kenster you nailed it sample %weigh it turn it into weight per litre take weight of empty barrel away from that..

And your right never enough rum..

I'd be using a dipstick like WJ, then a volume calc for a cylinder minus a little for rounded edges....

Weight is a tough one... even if you figured it out, you'd need to know the empty weight for the barrel to work out how much you've got.

If my maths are still good (and you know your empty barrel weight), pure ethanol weighs 789g per litre. So at 62.5%. it'd be 37.5% of the volume at an extra 211g per litre of the way back towards 1(water is 1000g/L), so about 868g/L. This would be about 913g/L at 40%.

Or if you have 50%ABV its easy.
Take weights per litre, in that link i posted, of water and ethanol.
Divide both by 2 and add them together for your weight of however many litres you have of 50%.
IE:
for 20L of 65%
20L of 100% ethanol is 15.702kg (20 × 0.7851)
20L of water is 20kg .
Ethanol - 15.702 ÷ 100 × 65= 10.2063kg
Water - 20 ÷ 100 × 35 = 7kg
10.2063 + 7 = 17.2063kg
So 20L of 65% should weigh about 17.2kg.
Or roughly 0.86kg/L


Or to simplify it further.
Ethanol percent + remaining percent of water.
(0.7751 × .65) + (1 × .35)
=0.8603

Kenster wrote:cant you just take a sample, measure the ABV, say 40%, then u know how much you have. Is 'weight' overthinking it?
If its the weight inside the barrel, just empty the contents and record how many lit you have, put it back and record what goes in and comes out afterwards.

:text-+1: By the time it would take me ta calculate and the dought I would have,I could of tipped it out and measured plus taken the necesary samples a couple of times,makeing it a lot more enjoyable and accurate ta me.cheers hillzabilly ;-)